a)RELAXEDto stop worrying and become more relaxed, or to make someone do this (使)无拘无束,(使)放松
She loosened up after she’d had a drink.
一杯酒下肚她便放松了下来。
loosen somebody ↔ up
His welcoming smile helped loosen her up.
他那热情的微笑有助于使她放松下来。
b)DSif your musclesloosen up, or if something loosens them up, they stop feeling stiff (使)〔肌肉〕活动开来,放松
loosen something ↔ up
A massage will loosen up your joints.
按摩可以放松关节。
Examples from the Corpus
loosen up• At first, I just started drinking at parties, to help loosen me up.• UncleBilly was a great preacher -- he sure could loosen a crowd up.• Hey, loosen up! It's not worth getting upset about something she said.• Our dramateacher would do crazy things, just to get us to loosen up some.