Entry 3 senses · 2 variants Webster, 1913 Atticize · At·ti·cize · IPA v. t. v. i. 01 v. t. To conform or make conformable to the language, customs, etc., of Attica. 1. To conform or make conformable to the language, customs, etc., of Attica. 02 v. i. To side with the Athenians. 1. To side with the Athenians. 2. To use the Attic idiom or style; to conform to the customs or modes of thought of the Athenians.