Entry 2 senses · 2 variants Webster, 1913 Gallican · Gal·li·can · IPA a. n. 01 a. Of or pertaining to Gaul or France; Gallic; French; as, the Gallican church or clergy. 1. Of or pertaining to Gaul or France; Gallic; French; as, the Gallican church or clergy. 02 n. An adherent to, and supporter of, Gallicanism. 1. An adherent to, and supporter of, Gallicanism.