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WordNet-OnlineFree dictionary and thesaurus of English. Definitions, synonyms, antonyms and more...
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Verb lighten up has 2 senses
brighten, lighten up, lighten - make lighter or brighter; "The paint will brighten the room"--1 is one way to change, alter, modify
 Sample sentences:
 Somebody ----s something
 Something ----s something
 
lighten, lighten up - become lighter; "The room lightened up"--2 is one way to change
 Sample sentence:
 Something ----s
 
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