Entry 2 senses · 2 variants Webster, 1913 Assailant /əs-āl'-ənt/ · As·sail·ant · IPA /əˈseɪlənt/ a. n. 01 a. Assailing; attacking. 1. Assailing; attacking. 02 n. One who, or that which, assails, attacks, or assaults; an assailer. 1. One who, or that which, assails, attacks, or assaults; an assailer. “An assailant of the church.” — Macaulay.