adj · noun · 12 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.
/ˌæk.sɪˈdɛn.tl̩/
US:Recorded audio is listed in the source snapshot.
Received-Pronunciation:Recorded audio is listed in the source snapshot.
rhymes with -ɛntəl
CMU ARPABET:AE2 K S AH0 D EH1 N T AH0 L
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
CMU ARPABET 2:AE2 K S AH0 D EH1 N AH0 L
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
adj
Meaning 1
Pertaining to accident and not essence; thus, inessential; incidental; secondary.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
2
adj
Meaning 2
Pertaining to accident and not essence; thus, inessential; incidental; secondary.
Nonessential to something's inherent nature (especially in Aristotelian thought).
Definition source: English Wiktionary via Wiktextract
Topics: human-sciences, philosophy, sciences
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
3
adj
Meaning 3
Adjusted by one or two semitones, in temporary departure from the key signature.
Definition source: English Wiktionary via Wiktextract
Topics: entertainment, lifestyle, music
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
4
adj
Meaning 4
Occurring sometimes, by chance; occasional.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
5
adj
Meaning 5
Happening by chance, or unexpectedly; taking place not according to the usual course of things; by accident, unintentional.
Definition source: English Wiktionary via Wiktextract
Examples
The discovery was purely accidental.
He was killed by an accidental gunshot.
accidental damage
accidental death
entirely accidental
Meaning relationships
Synonyms: none provided
Antonyms: none provided
6
adj
Meaning 6
Being a double point with two distinct tangent planes in 4-dimensional projective space.
Definition source: English Wiktionary via Wiktextract
Topics: geometry, mathematics, sciences
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
7
noun
Meaning 7
A property which is not essential; a nonessential; anything happening accidentally.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
8
noun
Meaning 8
Those fortuitous effects produced by luminous rays falling on certain objects so that some parts stand forth in abnormal brightness and other parts are cast into a deep shadow.
Definition source: English Wiktionary via Wiktextract
Usage: plural, plural-only
Qualifier: painting
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
9
noun
Meaning 9
A sharp, flat, or natural, occurring not at the commencement of a piece of music as the signature, but before a particular note.
Definition source: English Wiktionary via Wiktextract
Topics: entertainment, lifestyle, music
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
10
noun
Meaning 10
Part of a text that has a mainly structural purpose, such as spelling, punctuation, or capitalization.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
11
adjective satellite
Meaning 11
happening by chance or unexpectedly or unintentionally
Definition source: Princeton WordNet 3.0
Examples
with an inadvertent gesture she swept the vase off the table
accidental poisoning
an accidental shooting
Meaning relationships
Synonyms: inadvertent
Antonyms: none provided
12
noun
Meaning 12
a musical notation that makes a note sharp or flat or natural although that is not part of the key signature
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
Broader terms: musical notation
History
Etymology
From Middle English accidental, from Anglo-Norman accidentel, Middle French accidentel, accidental, and their source, Late Latin accidēntālis; corresponding to accident + -al.
Across languages
Translations
80 source translations are retained for this English entry.
Arabic:
عَرْضِيّ
(ʕarḍiyy)
— happening by chance
Armenian:
պատահական
(patahakan)
— happening by chance
Bashkir:
осраҡлы
(osraqlı)
— happening by chance
Belarusian:
выпадко́вы
(vypadkóvy)
— happening by chance
Belarusian:
неспадзява́ны
(njespadzjavány)
— happening by chance
Bulgarian:
случа́ен
(slučáen)
— happening by chance
Bulgarian:
неоча́кван
(neočákvan)
— happening by chance
Catalan:
accidental
— happening by chance
Chinese Mandarin:
偶然
(ǒurán)
— happening by chance
Czech:
nahodilý
— happening by chance
Czech:
náhodný
— happening by chance
Danish:
tilfældig
— happening by chance
Dutch:
toevallig
— happening by chance
Esperanto:
neatendita
— happening by chance
Esperanto:
hazarda
— happening by chance
Esperanto:
akcidenta
— happening by chance
Finnish:
sattumanvarainen
— happening by chance
Finnish:
sattumalta
— happening by chance
French:
accidentel
— happening by chance
Georgian:
შემთხვევითი
(šemtxveviti)
— happening by chance
German:
versehentlich
— happening by chance
German:
zufällig
— happening by chance
Greek:
τυχαίος
(tychaíos)
— happening by chance
Ancient Greek:
τυχαῖος
(tukhaîos)
— happening by chance
Hebrew:
מִקְרִי
(mikrí)
— happening by chance
Hindi:
आकस्मिक
(ākasmik)
— happening by chance
Hindi:
संयोगी
(sãyogī)
— happening by chance
Hindi:
आगंतुक
(āgantuk)
— happening by chance
Hindi:
इत्तफ़ाक़िया
(ittafāqiyā)
— happening by chance
Hungarian:
véletlen
— happening by chance
Irish:
aimseach
— happening by chance
Irish:
toirmeascach
— happening by chance
Italian:
accidentale
— happening by chance
Japanese:
偶然の
(gūzen no)
— happening by chance
Korean:
우연하다
(uyeonhada)
— happening by chance
Korean:
돌발적
(dolbaljeok)
— happening by chance
Latin:
fortuītus
— happening by chance
Macedonian:
случаен
(slučaen)
— happening by chance
Māori:
kōpeka
— happening by chance
Norwegian Bokmål:
tilfeldig
— happening by chance
Persian:
تصادفی
(tasâdofi)
— happening by chance
Polish:
przypadkowy
— happening by chance
Portuguese:
acidental
— happening by chance
Romanian:
accidental
— happening by chance
Romanian:
întâmplător
— happening by chance
Russian:
случа́йный
(slučájnyj)
— happening by chance
Russian:
неожи́данный
(neožídannyj)
— happening by chance
Serbo-Croatian:
слу̏ча̄јан
— happening by chance
Serbo-Croatian:
нена́мјеран
— happening by chance
Serbo-Croatian:
slȕčājan
— happening by chance
Serbo-Croatian:
nenámjeran
— happening by chance
Slovak:
náhodný
— happening by chance
Slovene:
naključen
— happening by chance
Spanish:
accidental
— happening by chance
Spanish:
casual
— happening by chance
Spanish:
imprevisto
— happening by chance
Spanish:
fortuito
— happening by chance
Swedish:
tillfällig
— happening by chance
Tajik:
тасодуфӣ
(tasodufi)
— happening by chance
Tatar:
очраклы
(oçraqlı)
— happening by chance
Ukrainian:
випадко́вий
(vypadkóvyj)
— happening by chance
Ukrainian:
несподі́ваний
(nespodívanyj)
— happening by chance
Urdu:
حادثاتی
(hādsātī)
— happening by chance
Urdu:
ناگہاں
(nāgahā̃)
— happening by chance
Uzbek:
tasodifiy
— happening by chance
Bulgarian:
несъществено качество
(nesǎštestveno kačestvo)
— a property which is not essential
German:
Zufall
— a property which is not essential
German:
Versehen
— a property which is not essential
Polish:
wypadkowa
— a property which is not essential