dim

Entry Definition
(sun during eclipse, lightbulb) s/he, it is small and shining; (star, lamp, lantern, electric light) s/he, it is dim or faint
s/he dims it, turns it down (light, lamp)
s/he dims it, turns it down or lowers it (light); s/he shines it on something lower down
it gives off dim or faint light
dimmer switch for headlights
s/he dims headlights for h/ (oncoming driver)