not seemly; not in keeping with established standards of taste or proper form; unbecoming or indecorous in appearance, speech, conduct, etc.: an unseemly act; unseemly behavior.
2.
inappropriate for time or place: an unseemly hour.
adverb
3.
in an unseemly manner.
Origin: 1250–1300;Middle English; see un-1, seemly
Related forms
un·seem·li·ness, noun
Synonyms 1. unbefitting, inappropriate. See improper.