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1. (sometimes followed by 'to') minor or casual or subordinate in significance or nature or occurring as a chance concomitant or consequence
   "incidental expenses"; "the road will bring other incidental advantages"; "extra duties incidental to the job"; "labour problems incidental to a rapid expansion"; "confusion incidental to a quick change"
   - incident
    
2. Not of prime or central importance
   - nonessential
    
3. Following or accompanying as a consequence
   "snags incidental to the changeover in management"
   - attendant, consequent, accompanying, concomitant, ensuant, resultant, sequent

1. (frequently plural) an expense not budgeted or not specified
   "he requested reimbursement of $7 for incidental expenses"
   - incidental expense, minor expense
    
2. An item that is incidental

Derived forms: incidentals

See also: incidentally, inessential, omissible, parenthetic, parenthetical, peripheral, secondary, subsequent, unessential

Type of: expense, item, point

Antonym: basic

Encyclopedia: Incidental