english
1
general::
Phrase(s): dim something up to use a dimmer to make the lights brighter. (Theatrical. A dimmer is a rheostat, variable transformer, or something similar. The expression, a seeming contradiction, is the opposite of dim something down.) • As the curtain rose, the electrician dimmed the lights up on a beautiful scene. • You dimmed up the lights too fast.
McGrawhill's American Idioms And Phrasal Verbs