befitting or characteristic of a young boy - a boyish grin - schoolboyish pranks • Syn: boyish, schoolboyish • Similar to: young, immature • Derivationally related forms: boyishness (for: boyish)
II - adverb
like a boy - he smiled boyishly at his fiancee • Syn: boyishly • Derived from adjective: boyish (for: boyishly)