Standard Lemma guide

initiator

noun · 6 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.

  • CMU ARPABET: IH2 N IH0 SH IY1 EY0 T ER0 Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

noun

Meaning 1

One who initiates.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

A substance that initiates a chain reaction or polymerization.

Definition source: English Wiktionary via Wiktextract

Topics: chemistry, natural-sciences, physical-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

A component of a nuclear weapon that produces a burst of neutrons to start the chain reaction.

Definition source: English Wiktionary via Wiktextract

Topics: government, military, politics, war

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

A task (in a mainframe computer) that initiates multiple jobs.

Definition source: English Wiktionary via Wiktextract

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

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

noun

Meaning 5

A material whose presence in the body eventually leads to cancer.

Definition source: English Wiktionary via Wiktextract

Topics: medicine, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

6

noun

Meaning 6

a person who initiates a course of action

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: instigator

Antonyms: none provided

Broader terms: leader

Narrower terms: aggressor

History

Etymology

Borrowed from Latin initiātor. By surface analysis, initiate + or.

Across languages

Translations

38 source translations are retained for this English entry.

  • Arabic: مُبَادِر (mubādir) — one who initiates
  • Azerbaijani: təşəbbüskar — one who initiates
  • Bulgarian: инициатор (iniciator) — one who initiates
  • Catalan: iniciador — one who initiates
  • Catalan: iniciadora — one who initiates
  • Chinese Mandarin: 创办者,发起人 — one who initiates
  • Dutch: initiator — one who initiates
  • Finnish: alullepanija — one who initiates
  • Finnish: aloittaja — one who initiates
  • Finnish: käynnistäjä — one who initiates
  • French: initiateur — one who initiates
  • French: initiatrice — one who initiates
  • Georgian: ინიციატორი (iniciaṭori) — one who initiates
  • Georgian: წამომწყები (c̣amomc̣q̇ebi) — one who initiates
  • German: Initiator — one who initiates
  • German: Initiatorin — one who initiates
  • Indonesian: inisiator — one who initiates
  • Indonesian: pemrakarsa — one who initiates
  • Indonesian: pelopor — one who initiates
  • Italian: iniziatore — one who initiates
  • Italian: iniziatrice — one who initiates
  • Japanese: 言い出しっ屁 (iidashippe) — one who initiates
  • Malay: pemula — one who initiates
  • Russian: инициа́тор (iniciátor) — one who initiates
  • Russian: основополо́жник (osnovopolóžnik) — one who initiates
  • Spanish: iniciador — one who initiates
  • Spanish: iniciadora — one who initiates
  • Ukrainian: ініціа́тор (iniciátor) — one who initiates
  • Ukrainian: ініціа́торка (iniciátorka) — one who initiates
  • Ukrainian: зачина́тель (začynátelʹ) — one who initiates
  • Ukrainian: зачина́телька (začynátelʹka) — one who initiates
  • Ukrainian: основополо́жник (osnovopolóžnyk) — one who initiates
  • Ukrainian: основополо́жниця (osnovopolóžnycja) — one who initiates
  • Finnish: käynnistäjä — chemistry: substance that initiates a chain reaction or polymerization
  • German: Initiator — chemistry: substance that initiates a chain reaction or polymerization
  • Finnish: laukaisin — military: component of a nuclear weapon
  • Finnish: käynnistäjä — medicine: material whose presence in the body eventually leads to cancer
  • Finnish: initiaattori — medicine: material whose presence in the body eventually leads to cancer
Real reading context

initiator in complete knowledge articles