Entry 2 senses · 2 variants Webster, 1913 Ovoid /ōv'-oidˌ/ · O·void · IPA /ˈoʊvɔɪd/ a. n. 01 a. Resembling an egg in shape; egg-shaped; ovate; as, an ovoidal apple. 1. Resembling an egg in shape; egg-shaped; ovate; as, an ovoidal apple. Syn. oviform. 02 n. A solid resembling an egg in shape. 1. A solid resembling an egg in shape.