Meaning of “trifle” - Learner’s Dictionary

trifle

noun uk us /ˈtraɪfl/
a trifle formal

slightly:

It does seem a trifle odd.
SWEET DISH [ C, U ] UK

a cold, sweet dish that has layers of cake, fruit, custard (= sweet, yellow sauce), and cream

UNIMPORTANT THING [ C ] formal

something silly or unimportant

(Definition of “trifle” from the Cambridge Learner’s Dictionary © Cambridge University Press)