/gayt"hows'/ , n. , pl. gatehouses /-how'ziz/ .
1. a house at or over a gate, used as a gatekeeper's quarters, fortification, etc.
2. a house or structure at the gate of a dam, reservoir, etc., with equipment or controls for regulating the flow of water.
[ 1350-1400; ME; see GATE 1 , HOUSE ]