Dictionary.com
definitions

accidental

[ak-si-den-tl]
See more synonyms for accidental on Thesaurus.com
adjective
  1. happening by chance or accident; not planned; unexpected: an accidental meeting.
  2. nonessential; incidental; subsidiary: accidental benefits.
  3. Music. relating to or indicating sharps, flats, or naturals.
noun
  1. a nonessential or subsidiary circumstance, characteristic, or feature.
  2. Music. a sign placed before a note indicating a chromatic alteration of its pitch.

Origin of accidental

First recorded in 1350–1400; Middle English word from Medieval Latin word accidentālis. See accident, -al1
Related formsac·ci·den·tal·ly, ac·ci·dent·ly, adverbac·ci·den·tal·ness, ac·ci·den·tal·i·ty, nounnon·ac·ci·den·tal, adjective, nounnon·ac·ci·den·tal·ly, adverbnon·ac·ci·den·tal·ness, nounpre·ac·ci·den·tal, adjectivepre·ac·ci·den·tal·ly, adverbpseu·do·ac·ci·den·tal, adjectivepseu·do·ac·ci·den·tal·ly, adverbqua·si-ac·ci·den·tal, adjectivequa·si-ac·ci·den·tal·ly, adverbun·ac·ci·den·tal, adjectiveun·ac·ci·den·tal·ly, adverb

Synonyms for accidental

See more synonyms for on Thesaurus.com
1. unintentional, unforeseen.

Synonym study

1. Accidental, casual, fortuitous all describe something outside the usual course of events. Accidental implies occurring unexpectedly or by chance: an accidental blow. Casual describes a passing event of slight importance: a casual reference. Fortuitous is applied to events occurring without known cause, often of a fortunate or favorable nature: a fortuitous shower of meteors. It often also implies good luck or good fortune: a fortuitous choice leading to rapid advancement.

Antonyms for accidental

1. planned, contrived.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for accidentally

unwittingly, unintentionally, haphazardly

Examples from the Web for accidentally

Contemporary Examples of accidentally

Historical Examples of accidentally

  • He said he was out hunting with a friend, and his friend's gun went off accidentally.

    Brave and Bold

    Horatio Alger

  • When accidentally struck by the janitor's broom, he gives off a cloud of dust.

  • The eldest of these is accidentally killed by the second, 2440.

    Beowulf

    Unknown

  • Perhaps we may come upon it accidentally in the course of the play.

    Echoes of the War

    J. M. Barrie

  • I am in no hurry for all, or any of these, but if you accidentally meet with them very-cheap, get them for me.

British Dictionary definitions for accidentally

accidental

adjective
  1. occurring by chance, unexpectedly, or unintentionally
  2. nonessential; incidental
  3. music denoting sharps, flats, or naturals that are not in the key signature of a piece
  4. logic (of a property) not essential; contingent
noun
  1. an incidental, nonessential, or supplementary circumstance, factor, or attribute
  2. music a symbol denoting a sharp, flat, or natural that is not a part of the key signature
Derived Formsaccidentally, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for accidentally
adv.

late 14c., "non-essentially," also "unnaturally," from accidental + -ly (2). Meaning "unintentionally" is recorded from 1580s; phrase accidentally on purpose is recorded from 1862.

accidental

adj.

late 14c., "non-essential," from Old French accidentel or directly from Medieval Latin accidentalis, from Latin accidentem (see accident). Meaning "outside the normal course of nature" is from early 15c.; that of "coming by chance" is from 1570s.

accidental

n.

late 14c., "non-essential quality," from accidental (adj.). The musical sense is from 1868.

Online Etymology Dictionary, © 2010 Douglas Harper