Entry 2 senses · 2 variants Webster, 1913 Shrilly · Shril·ly · IPA /ˈʃɹɪli/ adv. a. 01 adv. In a shrill manner; acutely; with a sharp sound or voice. 1. In a shrill manner; acutely; with a sharp sound or voice. 02 a. Somewhat shrill. 1. Somewhat shrill.[Poetic] “Some kept up a shrilly mellow sound.” — Keats.