Entry 1 sense Webster, 1913 Architectural /ärˌ-kət-ĕk'-chẽr-əl/ · Ar·chi·tec·tur·al · IPA /ˌɑɹkɪˈtɛkt͡ʃəɹəl/ 01 a. Of or pertaining to the art of building; conformed to the rules of architecture. 1. Of or pertaining to the art of building; conformed to the rules of architecture.