to make or become loose or looser; specif.,
- to free from confinement or restraint; unbind, unfasten, etc.
- to make less taut, less compact, etc.
loosen up☆ Informal
- to talk freely
- to give money generously
- to relax
verbloos·ened, loos·en·ing, loos·ens
- To make looser or less tight: loosened his tie; loosened her grip on the rope.
- To free from restraint, pressure, or strictness: loosened the requirements for graduation.
- To free (the bowels) from constipation.
To become loose or looser: My shoelace has loosened.Phrasal Verb: loosen up To do stretches or light exercise before a more strenuous activity. To become less strict or tense, as in one's demeanor; relax: always loosened up after he got home.
Origin of loosenMiddle English lousnen, losnen, from losen, from los, loose; see loose.
(third-person singular simple present loosens, present participle loosening, simple past and past participle loosened)