n.[C]

1. 翻筋斗者；雜技演員
2. 平底無腳酒杯；一杯的容量
   He drank a tumbler of brandy.

   他喝了一杯白蘭地。

3. （機槍的）機心
4. 鎖的制動栓
5. 【機】轉臂；轉筒；擺動換向齒輪；轉向輪
6. 滾筒式烘乾機
7. （玩具）不倒翁
8. 翻頭鴿

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.