From WordNet (r) 3.0 (2006):
lower
n 1: the lower of two berths [syn: lower berth, lower]
v 1: move something or somebody to a lower position; "take down
the vase from the shelf" [syn: lower, take down, let
down, get down, bring down] [ant: bring up,
elevate, get up, lift, raise]
2: set lower; "lower a rating"; "lower expectations" [syn:
lower, lour]
3: make lower or quieter; "turn down the volume of a radio"
[syn: turn down, lower, lour]
4: cause to drop or sink; "The lack of rain had depressed the
water level in the reservoir" [syn: lower, depress]
5: look angry or sullen, wrinkle one's forehead, as if to signal
disapproval [syn: frown, glower, lour, lower]