An example of trifling used as an adjective is a trifling gift card which means a gift card on which all the value has already been spent.
- that trifles; frivolous; shallow; fickle
- having little value or importance; trivial
- Of little worth or importance. See Synonyms at trivial.
- Frivolous or foolish: “Mr. Knightly &ellipsis; is not a trifling, silly young man” (Jane Austen).
(comparative more trifling, superlative most trifling)