adj.
1.(sometimes followed by `to') minor or casual or subordinate in significance or nature or occurring as a chance concomitant or consequence
2.following as a consequence
3.not of prime or central importance incidental n.
1.(frequently plural) an expense not budgeted or not specified
2.an item that is incidental
Idiom of the Day
at a loss for words
speechless, unable to speak
I was at a loss for words when I met my friend after many years.