Entry 3 senses · 2 variants Webster, 1913 Basilic · Ba·sil·ic · IPA /ˈbæsɪlɪk/ n. a. 01 n. Basilica. 1. Basilica. 02 a. Royal; kingly; also, basilican. 1. Royal; kingly; also, basilican. 2. Pertaining to certain parts, anciently supposed to have a specially important function in the animal economy, as the middle vein of the right arm.(Anat.)