Standard Lemma guide

injective

adj · 4 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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  • /ɪnˈd͡ʒɛktɪv/
  • US: Recorded audio is listed in the source snapshot.
  • rhymes with -ɛktɪv

1

adj

Meaning 1

Of, relating to, or being an injection: such that each element of the image (or range) is associated with at most one element of the preimage (or domain); inverse-deterministic

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

Topics: mathematics, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: one-to-one

Antonyms: none provided

2

adj

Meaning 2

Loosely, having a certain generalizing property, abstracted from the study of Q as a Z-module. Formally, such that any short exact sequence of (left) R-modules beginning with M splits, or any of several equivalent statements: See Injective module.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

Qualifier: module theory

Topics: algebra, mathematics, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

adj

Meaning 3

Loosely, having a property analogous to that which characterizes injective modules (see above). Formally, such that, given a monomorphism f:X→Y in C, for every morphism g:X→Q there exists a morphism h:Y→Q such that h∘f=g; see Injective object.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

Qualifier: most generally

Topics: category-theory, computing, engineering, mathematics, natural-sciences, physical-sciences, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

adj

Meaning 4

Such that the objects (usually modules) involved in the resolution are injective (in the algebraic senses above).

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

Qualifier: homological algebra

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

Borrowed from French injectif.

Across languages

Translations

20 source translations are retained for this English entry.

  • Catalan: injectiu — inverse-deterministic
  • Chinese Mandarin: 內射的 /内射的 (nèishède) — inverse-deterministic
  • Chinese Mandarin: 单射的 (dānshède) — inverse-deterministic
  • Czech: prostý — inverse-deterministic
  • Czech: injektivní — inverse-deterministic
  • Danish: injektiv — inverse-deterministic
  • Finnish: injektiivinen — inverse-deterministic
  • French: injectif — inverse-deterministic
  • German: injektiv — inverse-deterministic
  • Greek: αμφιμονότιμη (amfimonótimi) — inverse-deterministic
  • Icelandic: eintækur — inverse-deterministic
  • Irish: inteilgeach — inverse-deterministic
  • Japanese: 入射の (nyuushyano) — inverse-deterministic
  • Japanese: 単射の (tannshano) — inverse-deterministic
  • Polish: różnowartościowa — inverse-deterministic
  • Portuguese: injetivo — inverse-deterministic
  • Romanian: injectiv — inverse-deterministic
  • Russian: инъекти́вный (inʺjektívnyj) — inverse-deterministic
  • Spanish: inyectivo — inverse-deterministic
  • Swedish: injektiv — inverse-deterministic
Real reading context

injective in complete knowledge articles