Entry 2 senses · 2 variants Webster, 1913 Assoilment · As·soil·ment · IPA n. n. 01 n. Act of assoiling, or state of being assoiled; absolution; acquittal. 1. Act of assoiling, or state of being assoiled; absolution; acquittal. 02 n. A soiling; defilement. 1. A soiling; defilement.