tester

1. N-COUNT A tester is a person who has been asked to test a particular thing. 测试员; 试验员

2. N-COUNT A tester is a machine or device that you use to test whether another machine or device is working correctly. 测试器; 测试仪[usu n N]

I have a battery tester in my garage. 我的车库里有台电池测试仪。

3. N (in furniture) a canopy, esp the canopy over a four-poster bed 华盖