■ noun
1》 a drinking glass with straight sides and no handle or stem. [formerly having a rounded bottom so that it could not be set down until emptied.]
2》 an acrobat.
3》 a tumble dryer.
4》 a pigeon of a breed that repeatedly turns over backwards in flight.
5》 a pivoted piece in a lock that holds the bolt until lifted by a key.
↘a notched pivoted plate in a gunlock.
6》 an electrical switch worked by pushing a small sprung lever.
7》 a tumbling barrel.