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
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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.
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
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
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