incidental

The definition of incidental is an unintended consequence of something, or a related but unimportant part.

(adjective)

Destruction of the forests is an example of an incidental or unintended consequence of population growth.
Paperwork is an example of an incidental part of the job of an airline pilot.

See incidental in Webster's New World College Dictionary

adjective

1. happening as a result of or in connection with something more important; casual: incidental benefits
2. likely to happen as a result or concomitant: with to: troubles incidental to divorce
secondary or minor, but usually associated: incidental expenses

Origin: ML incidentalis

noun

See incidental in American Heritage Dictionary 4

adjective

Occurring or likely to occur as an unpredictable or minor accompaniment: the snags incidental to a changeover in upper management. See Synonyms at accidental.
Of a minor, casual, or subordinate nature: incidental expenses.

noun

A minor accompanying item or expense: a pocket in the suitcase for incidentals.

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