Entry 1 sense Webster, 1913 Merrily /mĕr'-əl-ē/ · Mer·ri·ly · IPA /ˈmɛɹɪli/ 01 adv. In a merry manner; with mirth; with gayety and laughter; jovially. See Mirth, and Merry. 1. In a merry manner; with mirth; with gayety and laughter; jovially. See Mirth, and Merry. See: Mirth, Merry “Merrily sing, and sport, and play.” — Granville.