Standard Lemma guide

simplex

adj · noun · 13 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • Received-Pronunciation: /ˈsɪmplɛks/
  • General-American: /ˈsɪmˌplɛks/
  • Southern-England: Recorded audio is listed in the source snapshot.
  • US: Recorded audio is listed in the source snapshot.
  • Received-Pronunciation: /ˈsɪmplɪsiːz/
  • General-American: /ˈsɪmpləˌsiz/
  • US: Recorded audio is listed in the source snapshot.
  • General-American, Received-Pronunciation: /sɪmˈplɪsiə/
  • US: Recorded audio is listed in the source snapshot.
  • CMU ARPABET: S IH1 M P L EH2 K S Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

adj

Meaning 1

Having a single structure; not composite or complex; undivided, unitary.

Definition source: English Wiktionary via Wiktextract

Usage: dated, not-comparable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: monoplex, uniplex

Antonyms: complex

2

adj

Meaning 2

Of an eye: (supposedly) having pigment on only the posterior surface of the iris and not the anterior surface, and thus appearing blue; this was later found to be inaccurate, as eye colour is due to the amount of pigment in the anterior surface of the iris; also, of eye pigmentation: present only on the posterior surface of the iris; and of a person: having eyes with this form of pigmentation.

Definition source: English Wiktionary via Wiktextract

Usage: historical, not-comparable

Topics: anatomy, medicine, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: duplex

3

adj

Meaning 3

Of a circuit or device: involving signals which travel in one direction at a time; unidirectional.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

Topics: communications, computing, electrical-engineering, engineering, mathematics, natural-sciences, physical-sciences, sciences, telecommunications

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: bidirectional, duplex

4

adj

Meaning 4

Of a polyploid organism: having one dominant allele at a given locus on all homologous chromosomes.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

Topics: biology, genetics, medicine, natural-sciences, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

adj

Meaning 5

Synonym of heterozygous (“of an organism: having two different alleles in a given gene”).

Definition source: English Wiktionary via Wiktextract

Usage: archaic, not-comparable, obsolete

Topics: biology, genetics, medicine, natural-sciences, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: heterozygous

Antonyms: none provided

6

adj

Meaning 6

Of a word: having no (derivational) affixes; simple, monomorphemic, uncompounded.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

Topics: human-sciences, linguistics, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: polymorphemic

7

adj

Meaning 7

Of an apartment (or, sometimes, another type of property): having only one floor or storey; single-storey.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

8

noun

Meaning 8

A generalization of a triangle or tetrahedron to an arbitrary dimension; more accurately, the convex hull of n+1 affinely independent points in n-dimensional space.

Definition source: English Wiktionary via Wiktextract

Topics: algebraic-topology, geometry, mathematics, sciences, topology

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

9

noun

Meaning 9

A word which is not compound and contains no derivational affixes (inflectional affixes are usually disregarded); a monomorphemic word.

Definition source: English Wiktionary via Wiktextract

Topics: human-sciences, linguistics, sciences

Examples

  • The word weak is a simplex. Its derivative weaken is not.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

10

noun

Meaning 10

In full simplex sentence: in transformational grammar: a simple sentence which is the product of a few transformations; a kernel sentence.

Definition source: English Wiktionary via Wiktextract

Usage: archaic

Topics: grammar, human-sciences, linguistics, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

11

noun

Meaning 11

An apartment (or, sometimes, another type of property) having only one floor or storey; a single-storey property.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

12

adjective satellite

Meaning 12

allowing communication in only one direction at a time, or in telegraphy allowing only one message over a line at a time

Definition source: Princeton WordNet 3.0

Examples

  • simplex system

Meaning relationships

Synonyms: none provided

Antonyms: none provided

13

adjective satellite

Meaning 13

having only one part or element

Definition source: Princeton WordNet 3.0

Examples

  • a simplex word has no affixes and is not part of a compound--like `boy' compared with `boyish' or `house' compared with `houseboat'

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

The adjective is a learned borrowing from Latin simplex (“plain, simple; single”). The first part, sim-, comes from Proto-Indo-European *sem-, *sm̥- (“one; together”). The second part, -plex, may be from *pleḱ- (“to weave”). The noun is derived from the adjective. The plural forms simplices and simplicia are learned borrowings from Latin simplicēs (masculine or feminine) and simplicia (neuter), respectively plural forms of simplex. Noun sense 1 (“generalization of a triangle or tetrahedron to an arbitrary dimension”) was apparently coined by the Dutch mathematician Pieter Hendrik Schoute (1846–1913) as a short version of Simplicissimum in Mehrdimensionale Geometrie (in German, 1902). (In his pioneering works on algebraic topology, the French mathematician Henri Poincaré (1854–1912) had previously introduced the concept, but not the actual term simplex.)

Across languages

Translations

54 source translations are retained for this English entry.

  • Bulgarian: симплекс (simpleks) — of a circuit or device: involving signals which travel in one direction at a time — see also unidirectional
  • Catalan: símplex — of a circuit or device: involving signals which travel in one direction at a time — see also unidirectional
  • Chinese Mandarin: 單工 /单工 (dāngōng) — of a circuit or device: involving signals which travel in one direction at a time — see also unidirectional
  • Finnish: yksisuuntainen — of a circuit or device: involving signals which travel in one direction at a time — see also unidirectional
  • Greek: μονόδρομος (monódromos) — of a circuit or device: involving signals which travel in one direction at a time — see also unidirectional
  • Indonesian: simplêks — of a circuit or device: involving signals which travel in one direction at a time — see also unidirectional
  • Vietnamese: đơn công — of a circuit or device: involving signals which travel in one direction at a time — see also unidirectional
  • Finnish: simpleksinen — of a polyploid organism: having one dominant allele at a given locus on all homologous chromosomes
  • Bulgarian: прост (prost) — of a word: having no affixes
  • Finnish: simpleksinen — of a word: having no affixes
  • Finnish: johtamaton — of a word: having no affixes
  • Bulgarian: едноетажен (ednoetažen) — of a property: having only one floor or storey
  • Finnish: yksikerroksinen — of a property: having only one floor or storey
  • Albanian: simpleks — generalization of a triangle or tetrahedron to an arbitrary dimension, the generalization being the simplest possible convex polytope for a given dimension
  • Arabic: مُبَسَّط (mubassaṭ) — generalization of a triangle or tetrahedron to an arbitrary dimension, the generalization being the simplest possible convex polytope for a given dimension
  • Armenian: սիմպլեքս (simplekʻs) — generalization of a triangle or tetrahedron to an arbitrary dimension, the generalization being the simplest possible convex polytope for a given dimension
  • Basque: simplex — generalization of a triangle or tetrahedron to an arbitrary dimension, the generalization being the simplest possible convex polytope for a given dimension
  • Bengali: ক্রমবর্তী সিমপ্লেক্স (kromborti śimoplekśo) — generalization of a triangle or tetrahedron to an arbitrary dimension, the generalization being the simplest possible convex polytope for a given dimension
  • Bulgarian: си́мплекс (símpleks) — generalization of a triangle or tetrahedron to an arbitrary dimension, the generalization being the simplest possible convex polytope for a given dimension
  • Catalan: símplex — generalization of a triangle or tetrahedron to an arbitrary dimension, the generalization being the simplest possible convex polytope for a given dimension
  • Chinese Mandarin: 單純形 /单纯形 (dānchúnxíng) — generalization of a triangle or tetrahedron to an arbitrary dimension, the generalization being the simplest possible convex polytope for a given dimension
  • Chuvash: си́мплекс (símpleks) — generalization of a triangle or tetrahedron to an arbitrary dimension, the generalization being the simplest possible convex polytope for a given dimension
  • Dutch: simplex — generalization of a triangle or tetrahedron to an arbitrary dimension, the generalization being the simplest possible convex polytope for a given dimension
  • Finnish: simpleksi — generalization of a triangle or tetrahedron to an arbitrary dimension, the generalization being the simplest possible convex polytope for a given dimension
  • French: simplexe — generalization of a triangle or tetrahedron to an arbitrary dimension, the generalization being the simplest possible convex polytope for a given dimension
  • German: Simplex — generalization of a triangle or tetrahedron to an arbitrary dimension, the generalization being the simplest possible convex polytope for a given dimension
  • Hebrew: סימפלקס — generalization of a triangle or tetrahedron to an arbitrary dimension, the generalization being the simplest possible convex polytope for a given dimension
  • Hungarian: szimplex — generalization of a triangle or tetrahedron to an arbitrary dimension, the generalization being the simplest possible convex polytope for a given dimension
  • Icelandic: hyrna — generalization of a triangle or tetrahedron to an arbitrary dimension, the generalization being the simplest possible convex polytope for a given dimension
  • Irish: aonphléacs — generalization of a triangle or tetrahedron to an arbitrary dimension, the generalization being the simplest possible convex polytope for a given dimension
  • Italian: simplesso — generalization of a triangle or tetrahedron to an arbitrary dimension, the generalization being the simplest possible convex polytope for a given dimension
  • Japanese: 単体 (tantai) — generalization of a triangle or tetrahedron to an arbitrary dimension, the generalization being the simplest possible convex polytope for a given dimension
  • Kazakh: симплекс (simpleks) — generalization of a triangle or tetrahedron to an arbitrary dimension, the generalization being the simplest possible convex polytope for a given dimension
  • Korean: 단체 (danche) — generalization of a triangle or tetrahedron to an arbitrary dimension, the generalization being the simplest possible convex polytope for a given dimension
  • Norwegian Bokmål: simpleks — generalization of a triangle or tetrahedron to an arbitrary dimension, the generalization being the simplest possible convex polytope for a given dimension
  • Persian: سادک — generalization of a triangle or tetrahedron to an arbitrary dimension, the generalization being the simplest possible convex polytope for a given dimension
  • Polish: sympleks — generalization of a triangle or tetrahedron to an arbitrary dimension, the generalization being the simplest possible convex polytope for a given dimension
  • Portuguese: simplex — generalization of a triangle or tetrahedron to an arbitrary dimension, the generalization being the simplest possible convex polytope for a given dimension
  • Portuguese: simplexo — generalization of a triangle or tetrahedron to an arbitrary dimension, the generalization being the simplest possible convex polytope for a given dimension
  • Romanian: simplex — generalization of a triangle or tetrahedron to an arbitrary dimension, the generalization being the simplest possible convex polytope for a given dimension
  • Russian: си́мплекс (símpleks) — generalization of a triangle or tetrahedron to an arbitrary dimension, the generalization being the simplest possible convex polytope for a given dimension
  • Slovak: simplex — generalization of a triangle or tetrahedron to an arbitrary dimension, the generalization being the simplest possible convex polytope for a given dimension
  • Slovene: simpleks — generalization of a triangle or tetrahedron to an arbitrary dimension, the generalization being the simplest possible convex polytope for a given dimension
  • Spanish: símplex — generalization of a triangle or tetrahedron to an arbitrary dimension, the generalization being the simplest possible convex polytope for a given dimension
  • Swedish: simplex — generalization of a triangle or tetrahedron to an arbitrary dimension, the generalization being the simplest possible convex polytope for a given dimension
  • Thai: ซิมเพล็กซ์ — generalization of a triangle or tetrahedron to an arbitrary dimension, the generalization being the simplest possible convex polytope for a given dimension
  • Ukrainian: си́мплекс (sýmpleks) — generalization of a triangle or tetrahedron to an arbitrary dimension, the generalization being the simplest possible convex polytope for a given dimension
  • Uzbek: simpleks — generalization of a triangle or tetrahedron to an arbitrary dimension, the generalization being the simplest possible convex polytope for a given dimension
  • Finnish: perussana — word which is not compound and contains no derivational affixes
  • German: Simplex — word which is not compound and contains no derivational affixes
  • Swedish: simplex — word which is not compound and contains no derivational affixes
  • Finnish: simpleksinen virke — in transformational grammar: a simple sentence which is the product of a few transformations
  • Bulgarian: едноета́жна сгра́да (ednoetážna sgráda) — property having only one floor or storey
  • Finnish: yksikerroksinen kiinteistö — property having only one floor or storey
Real reading context

simplex in complete knowledge articles