Entry 1 sense Webster, 1913 Convincingly /kən-vĭn'-sĭng-lē/ · Con·vin·cing·ly · IPA /kənˈvɪn.sɪŋ.li/ 01 adv. in a convincing manner; in a manner to compel assent. 1. in a convincing manner; in a manner to compel assent.