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Synonyms

incidental

American  
[in-si-den-tl] / ˌɪn sɪˈdɛn tl /

adjective

  1. happening or likely to happen in an unplanned or subordinate conjunction with something else.

    Synonyms:
    contingent, fortuitous, chance, casual
    Antonyms:
    fundamental
  2. incurred casually and in addition to the regular or main amount.

    incidental expenses.

  3. likely to happen or naturally appertaining (usually followed byto ).


noun

  1. something incidental, as a circumstance.

  2. incidentals, minor expenses.

incidental British  
/ ˌɪnsɪˈdɛntəl /

adjective

  1. happening in connection with or resulting from something more important; casual or fortuitous

  2. found in connection (with); related (to)

  3. caused (by)

  4. occasional or minor

    incidental expenses

"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

noun

  1. (often plural) an incidental or minor expense, event, or action

"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

Other Word Forms

Derived Forms

Etymology

Origin of incidental

First recorded in 1610–20; incident + -al 1

Explanation

Incidental means secondary in time or importance. If you lose weight because you moved and must walk further to school, the weight loss was incidental to the move. When something is incidental, it is never the main thing. It's okay to include incidental details as they can add depth to your storytelling, but they are never crucial to the story. A company might pay your main expenses when you travel for business but will probably not reimburse you for the incidental ones. The music you hear between acts of a play is called incidental. It's not crucial to the action, but it makes the waiting easier.

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Vocabulary lists containing incidental

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The timing of all this is not incidental.

From Salon • May 11, 2026

Van Dijk was clearly making a tackle, whereas contact from Pacho seemed to be incidental rather than a challenge on an opponent.

From BBC • Apr. 15, 2026

“This is not incidental capital, it represents roughly one-fifth of the total transaction value,” Booker and the others wrote.

From Los Angeles Times • Mar. 24, 2026

Amid them, the ballet moves seem more incidental than poetically potent.

From The Wall Street Journal • Mar. 18, 2026

And in what incidental details did their future fate lie?

From "Typical American" by Gish Jen

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