Entry 1 sense Webster, 1913 Icily /īs'-ĭl-ē/ · I·ci·ly · IPA /ˈaɪ.sɪ.li/ 01 adv. In an icy manner; coldly. 1. In an icy manner; coldly. “Faultily faultless, icily regular, splendidly null, Dead perfection, no more.” — Tennyson.