tri|fle / tr'aɪf ə l / (trifles trifling trifled) 1 [PHRASE] PHR adj/adv/prep You can use a trifle to mean slightly or to a small extent, especially in order make something you say seem less extreme. As a photographer, he'd found both locations just a trifle disappointing... 2 [N-COUNT] A trifle is something that is considered to have little importance, value, or significance. He had no money to spare on trifles... 3 [N-VAR] Trifle is a cold dessert made of layers of sponge cake, jelly, fruit, and custard, and usually covered with cream. trifle with [PHRASAL VERB] usu with brd-neg, be V-ed P, V P n If you say that someone is not a person to be trifled with , you are indicating to other people that they must treat that person with respect. He was not someone to be trifled with... No man in Tabriz trifled with the executioner.