Definition
- B1
to prevent entry into a place, or to ensure someone or something does not enter
阻止進入；不讓進入
We set up a fence outside to keep small animals out of the garden.
我們在外面設置了圍欄，以防止小動物進入花園。
This password can help keep unauthorized users out of the system.
這個密碼可以幫助防止未經授權的用戶進入系統。
I closed the windows to keep the cold wind out.
我關上窗戶，以防止冷風進來。