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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

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

Alongside that, she has come to embody something quieter: an understated ease that makes even high fashion seem incidental.

From BBC • May 9, 2026

But she allowed the ID law to stand, saying it had only incidental impact on the federal government, similar to speed limits on the highway.

From Los Angeles Times • Apr. 22, 2026

The answers, though, seem largely incidental beside the pageantry of haute cuisine and burbling table talk.

From The Wall Street Journal • Apr. 17, 2026

They bear only an incidental relationship to the landmasses that sit upon them.

From "A Short History of Nearly Everything" by Bill Bryson

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