Merriam-Webster Online Dictionary
chill out (verb)intransitive verb
slang to calm down go easy - relax often used in the imperative
Merriam-Webster Online Thesaurus
chill out (verb)1.
to become still and orderly
SYNONIMS:
calm (down), chill out, cool, hush, pipe down, settle (down)RELATED WORDS:
dry up; relax, tranquilize ( tranquillize), unwind, zone outNEAR ANTONYMS:
clown (around), fool around, horse around, monkey (around), show off, skylark2.
to get rid of nervous tension or anxiety
SYNONIMS:
chill, chill out, decompress, de-stress, loosen up, mellow (out), unwind, wind downRELATED WORDS:
unbend; bask, kick back, loll, lounge, repose, rest; bum, dally, dawdle, dillydally, drone, footle, goof (off), hack (around), hang (around out), idle, laze, loaf, vegetate, veg out, zone out; alleviate, comfort, ease, relieve; calm, compose, cool, quiet, settle