From Longman Dictionary of Contemporary Englisha triflea trifleformalQUITE/FAIRLY slightlya trifle eccentric/odd/unexpected etc → trifle
Examples from the Corpus
a trifle eccentric/odd/unexpected etc• She is a trifle odd; you will find out more about that.• That was a trifle unexpected, but Rossmayne was a man of honour and good sense. 