COMPLIMENT definition: 1. a remark that expresses approval, admiration, or respect: 2. an action that expresses approval…. Learn more. Compliment definition: an expression of praise, commendation , or admiration.. See examples of COMPLIMENT used in a sentence. The meaning of COMPLEMENT is something that fills up, completes, or makes better or perfect. How to use complement in a sentence. Is it complement or compliment ? Master the word " COMPLIMENT " in English: definitions, translations, synonyms, pronunciations, examples, and grammar insights - all in one complete resource.