Entry 3 senses · 2 variants Webster, 1913 Sidelong · Side·long · IPA /ˈsaɪd.lɑŋ/ adv. a. 01 adv. Laterally; obliquely; in the direction of the side. 1. Laterally; obliquely; in the direction of the side. 2. On the side; as, to lay a thing sidelong. 02 a. Lateral; oblique; not being directly in front; as, a sidelong glance. 1. Lateral; oblique; not being directly in front; as, a sidelong glance. “The bashful virgin's sidelong looks of love.” — Goldsmith.