- happening or likely to happen in an unplanned or subordinate conjunction with something else.
- incurred casually and in addition to the regular or main amount: incidental expenses.
- likely to happen or naturally appertaining (usually followed by to).
- something incidental, as a circumstance.
- incidentals, minor expenses.
Origin of incidental
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- happening in connection with or resulting from something more important; casual or fortuitous
- (postpositive foll by to) found in connection (with); related (to)
- (postpositive foll by upon) caused (by)
- occasional or minorincidental expenses
- (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
Word Origin and History for nonincidental
"casual, occasional," 1610s, from Medieval Latin incidentalis, from incidens (see incident (n.)). Incidentals (n.) "'occasional' expenses, etc.," is attested by 1707.
Online Etymology Dictionary, © 2010 Douglas Harper