n.
1) to apply, step on a ~; to pump the ~s; to put on the ~s; to jam on/slam on the ~s
2) to ride the ~s ('to use the ~s excessively')
3) ( fig .) to put a ~ on (the government put a ~ on plans for expansion)
4) to release a ~
5) an air; coaster; disk; electric; emergency; foot; hand; hydraulic; mechanical; power ~
6) the ~s jammed, locked; faded; failed; held, worked; screeched