Verb
1. move something or somebody to a lower position;
"take down the vase from the shelf"2. set lower;
"lower a rating""lower expectations"3. cause to drop or sink;
"The lack of rain had depressed the water level in the reservoir"4. make lower or quieter;
"turn down the volume of a radio"5. look angry or sullen, wrinkle one's forehead, as if to signal disapproval