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.
A minor accompanying item or expense: a pocket in the suitcase for incidentals.
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.