In′ci‐den″tal (?), a. Happening, as an occasional event, without regularity; coming without design; casual; accidental; hence, not of prime concern; subordinate; collateral; as, an incidental conversation; an incidental occurrence; incidental expenses.
By some, religious duties... appear to be regarded... as an incidental business. Rogers.
Syn. — Accidental; casual; fortuitous; contingent; chance; collateral. See Accidental.
— In′ci‐den″tal‐ly, adv. — In′ci‐den″tal‐ness, n.
I treat either or incidentally of colors. Boyle.