open a door
open a shop
open a meeting
open an account
A: Did you open the mail yet?
A：你读信了吗？
B: Yes, I opened it a few minutes ago.
B: 是的，我几分钟前已经打开了。
1) 使某物不再封闭
2) 开始经营或活动
3) 展开或呈现
1. 打开；开启
2. 开业；开幕
verb
1. To move something so that it is no longer closed or covered.
Synonym: unlock, unseal