- "he requested reimbursement of $7 for incidental expenses"
an item that is incidental
(sometimes followed by `to') minor or casual or subordinate in significance or nature or occurring as a chance concomitant or consequence
- "labor problems incidental to a rapid expansion"
- "extra duties incidental to the job"
- "the road will bring other incidental advantages"
- "incidental expenses"
not of prime or central importance
- "nonessential to the integral meanings of poetry - Pubs.MLA"