an artificial obstruction for checking or deflecting the flow of gases (as in a boiler), sounds (as in the loudspeaker system of a radio or hi-fi set), light (as in a darkroom), etc.
9.
any boxlike enclosure or flat panel for mounting a loudspeaker.
Origin: 1540–50; 1910–15 for def. 8; perhaps < Scots bauchle to disgrace, treat with contempt, equivalent to bauch (see baff) + -le