n.[C]

1. 翻筋斗者；杂技演员
2. 平底无脚酒杯；一杯的容量
   He drank a tumbler of brandy.

   他喝了一杯白兰地。

3. （机枪的）机心
4. 锁的制动栓
5. 【机】转臂；转筒；摆动换向齿轮；转向轮
6. 滚筒式烘干机
7. （玩具）不倒翁
8. 翻头鸽

n.

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.