Noun

• S: (n) lowering (the act of causing to become less)
• S: (n) lowering, letting down (the act of causing something to move to a lower level)
• direct hypernym / inherited hypernym / sister term
• S: (n) movement (the act of changing the location of something) "the movement of cargo onto the vessel"
• derivationally related form

Verb

• S: (v) lower, take down, let down, get down, bring down (move something or somebody to a lower position) "take down the vase from the shelf"
• S: (v) lower, lour (set lower) "lower a rating"; "lower expectations"
• S: (v) turn down, lower, lour (make lower or quieter) "turn down the volume of a radio"
• S: (v) lower, depress (cause to drop or sink) "The lack of rain had depressed the water level in the reservoir"
• S: (v) frown, glower, lour, lower (look angry or sullen, wrinkle one's forehead, as if to signal disapproval)

Adjective

• S: (adj) heavy, lowering, sullen, threatening (darkened by clouds) "a heavy sky"