adj · 8 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:/spɒnˈteɪ.ni.əs/
US:/spɑnˈteɪ.ni.əs/
US:Recorded audio is listed in the source snapshot.
rhymes with -eɪniəs
CMU ARPABET:S P AA0 N T EY1 N IY0 AH0 S
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
adj
Meaning 1
Self-directed; happening or acting without external cause or instigation; proceeding from natural feeling, temperament, or momentary impulse.
Definition source: English Wiktionary via Wiktextract
happening or arising without apparent external cause
Definition source: Princeton WordNet 3.0
Examples
spontaneous laughter
spontaneous combustion
a spontaneous abortion
Meaning relationships
Synonyms: self-generated
Antonyms: induced
8
adjective satellite
Meaning 8
said or done without having been planned or written in advance
Definition source: Princeton WordNet 3.0
Examples
he made a few ad-lib remarks
Meaning relationships
Synonyms: ad-lib, unwritten
Antonyms: none provided
History
Etymology
Etymology tree Latin sponte Proto-Indo-European *-nós Proto-Italic *-nos Latin -nus Latin -ānus Proto-Indo-European *-yósder. Proto-Indo-European *-éyos Proto-Italic *-ejos Proto-Italic *-eos Latin -eus Latin -āneus Late Latin spontāneuslbor. English spontaneous Learned borrowing from Late Latin spontāneus.
Across languages
Translations
109 source translations are retained for this English entry.
Assamese:
স্বতঃস্ফুৰ্ট
(sotohsphurt)
— self generated; happening without any apparent external cause
Bulgarian:
самопроизво́лен
(samoproizvólen)
— self generated; happening without any apparent external cause
Catalan:
espontani
— self generated; happening without any apparent external cause
Chinese Mandarin:
自发的
— self generated; happening without any apparent external cause
Czech:
spontánní
— self generated; happening without any apparent external cause
Dutch:
spontaan
— self generated; happening without any apparent external cause
Esperanto:
spontanea
— self generated; happening without any apparent external cause
Esperanto:
spontana
— self generated; happening without any apparent external cause
Finnish:
spontaani
— self generated; happening without any apparent external cause
French:
spontané
— self generated; happening without any apparent external cause
French:
volontaire
— self generated; happening without any apparent external cause
Galician:
ventureiro
— self generated; happening without any apparent external cause
German:
spontan
— self generated; happening without any apparent external cause
Greek:
αυθόρμητος
(afthórmitos)
— self generated; happening without any apparent external cause
Greek:
εθελοντικός
(ethelontikós)
— self generated; happening without any apparent external cause
Ancient Greek:
αὐτόματος
(autómatos)
— self generated; happening without any apparent external cause
Hungarian:
spontán
— self generated; happening without any apparent external cause
Italian:
spontaneo
— self generated; happening without any apparent external cause
Latin:
spontāneus
— self generated; happening without any apparent external cause
Macedonian:
спо́нтан
(spóntan)
— self generated; happening without any apparent external cause
Malay:
spontan
— self generated; happening without any apparent external cause
Māori:
tene
— self generated; happening without any apparent external cause
Norwegian Bokmål:
spontan
— self generated; happening without any apparent external cause
Norwegian Nynorsk:
spontan
— self generated; happening without any apparent external cause
Polish:
spontaniczny
— self generated; happening without any apparent external cause
Polish:
samorzutny
— self generated; happening without any apparent external cause
Portuguese:
espontâneo
— self generated; happening without any apparent external cause
Romanian:
spontan
— self generated; happening without any apparent external cause
Russian:
спонта́нный
(spontánnyj)
— self generated; happening without any apparent external cause
Russian:
самопроизво́льный
(samoproizvólʹnyj)
— self generated; happening without any apparent external cause
Serbo-Croatian:
spȍntān
— self generated; happening without any apparent external cause
Spanish:
espontáneo
— self generated; happening without any apparent external cause
Swedish:
spontan
— self generated; happening without any apparent external cause
Tagalog:
kusa
— self generated; happening without any apparent external cause
Turkish:
kendiliğinden
— self generated; happening without any apparent external cause
Turkish:
spontan
— self generated; happening without any apparent external cause
Ukrainian:
спонта́нний
(spontánnyj)
— self generated; happening without any apparent external cause
Ukrainian:
мимові́льний
(mymovílʹnyj)
— self generated; happening without any apparent external cause
Bulgarian:
спонтанен
(spontanen)
— done by one's own free choice, or without planning
Czech:
spontánní
— done by one's own free choice, or without planning
Finnish:
spontaani
— done by one's own free choice, or without planning
Finnish:
oma-aloitteinen
— done by one's own free choice, or without planning
Finnish:
omaehtoinen
— done by one's own free choice, or without planning
French:
spontané
— done by one's own free choice, or without planning
Galician:
espontáneo
— done by one's own free choice, or without planning
German:
spontan
— done by one's own free choice, or without planning
Greek:
αυθόρμητος
(afthórmitos)
— done by one's own free choice, or without planning
Greek:
αβίαστος
(avíastos)
— done by one's own free choice, or without planning
Hungarian:
spontán
— done by one's own free choice, or without planning
Italian:
spontaneo
— done by one's own free choice, or without planning
Latin:
extemporālis
— done by one's own free choice, or without planning
Macedonian:
добро́волен
(dobróvolen)
— done by one's own free choice, or without planning
Māori:
tene
— done by one's own free choice, or without planning
Polish:
spontaniczny
— done by one's own free choice, or without planning
Portuguese:
espontâneo
— done by one's own free choice, or without planning
Romanian:
spontan
— done by one's own free choice, or without planning
Russian:
доброво́льный
(dobrovólʹnyj)
— done by one's own free choice, or without planning
Scottish Gaelic:
saor-thoileach
— done by one's own free choice, or without planning
Serbo-Croatian:
spȍntān
— done by one's own free choice, or without planning
Swedish:
spontan
— done by one's own free choice, or without planning
Assamese:
সহজাত
(xohozat)
— proceeding from natural feeling or native tendency without external constraint
Bulgarian:
непринуден
(neprinuden)
— proceeding from natural feeling or native tendency without external constraint
Catalan:
espontani
— proceeding from natural feeling or native tendency without external constraint
Czech:
spontánní
— proceeding from natural feeling or native tendency without external constraint
French:
spontané
— proceeding from natural feeling or native tendency without external constraint
Greek:
αυθόρμητος
(afthórmitos)
— proceeding from natural feeling or native tendency without external constraint
Greek:
πηγαίος
(pigaíos)
— proceeding from natural feeling or native tendency without external constraint
Greek:
ενστικτώδης
(enstiktódis)
— proceeding from natural feeling or native tendency without external constraint
Macedonian:
непри́нуден
(neprínuden)
— proceeding from natural feeling or native tendency without external constraint
Māori:
tene
— proceeding from natural feeling or native tendency without external constraint
Serbo-Croatian:
spȍntān
— proceeding from natural feeling or native tendency without external constraint
Spanish:
espontáneo
— proceeding from natural feeling or native tendency without external constraint
Swedish:
spontan
— proceeding from natural feeling or native tendency without external constraint
Bulgarian:
спонтанен
(spontanen)
— arising from a momentary impulse
Catalan:
espontani
— arising from a momentary impulse
Czech:
impulzivní
— arising from a momentary impulse
Finnish:
impulsiivinen
— arising from a momentary impulse
French:
impulsif
— arising from a momentary impulse
Greek:
παρορμητικός
(parormitikós)
— arising from a momentary impulse
Greek:
αυθόρμητος
(afthórmitos)
— arising from a momentary impulse
Macedonian:
спо́нтан
(spóntan)
— arising from a momentary impulse
Māori:
ohia
— arising from a momentary impulse
Serbo-Croatian:
spȍntān
— arising from a momentary impulse
Serbo-Croatian:
ȉmpulzīvan
— arising from a momentary impulse
Spanish:
espontáneo
— arising from a momentary impulse
Swedish:
spontan
— arising from a momentary impulse
French:
réflexe
— controlled and directed internally
Greek:
ακούσιος
(akoúsios)
— controlled and directed internally
Swedish:
reflexmässig
— controlled and directed internally
Bulgarian:
естествен
(estestven)
— produced without being planted or without human labor
Finnish:
luonnollinen
— produced without being planted or without human labor
French:
indigène
— produced without being planted or without human labor
French:
endémique
— produced without being planted or without human labor
Galician:
ventureiro
— produced without being planted or without human labor
Macedonian:
при́роден
(príroden)
— produced without being planted or without human labor
Finnish:
spontaani
— not apparently contrived or manipulated
French:
naturel
— not apparently contrived or manipulated
French:
spontané
— not apparently contrived or manipulated
Greek:
αυθόρμητος
(afthórmitos)
— not apparently contrived or manipulated
Greek:
φυσικός
(fysikós)
— not apparently contrived or manipulated
Bulgarian:
внезапен
(vnezapen)
— sudden, without warning
Finnish:
yllättävä
— sudden, without warning
Finnish:
äkillinen
— sudden, without warning
French:
soudain
— sudden, without warning
Greek:
ξαφνικός
(xafnikós)
— sudden, without warning
Hungarian:
spontán
— sudden, without warning
Norwegian Bokmål:
plutselig
— sudden, without warning
Norwegian Nynorsk:
plutseleg
— sudden, without warning
Persian:
خود جوش، داوطلبانه، ناگهانی
— sudden, without warning