Entry 2 senses · 2 variants Webster, 1913 Unseemly · Un·seem·ly · IPA /ənsˈiːmliː/ a. adv. 01 a. Not seemly; unbecoming; indecent. 1. Not seemly; unbecoming; indecent. “An unseemly outbreak of temper.” — Hawthorne. 02 adv. In an unseemly manner. 1. In an unseemly manner.