▪ become relaxed or less tight: "the stiffness in his shoulders had loosened"Similarrelaxbecome relaxedunwindease up/offbecome less rigidinformal:let uphang looselighten upgo easy
▪ make (a connection or relationship) less strong: "he wanted to strengthen rather than loosen union links"
▪ (with reference to the bowels) make or become relaxed before excretion:"his bowels loosened in terror"