Entry 2 senses · 2 variants Webster, 1913 Unloose · Un·loose · IPA /ˌʌnˈlus/ v. t. v. i. 01 v. t. To make loose; to loosen; to set free. 1. To make loose; to loosen; to set free. 02 v. i. To become unfastened; to lose all connection or union. 1. To become unfastened; to lose all connection or union.