to rely on somebody/something and be able to trust them
Example:
- He was the sort of person you could depend on.
- He knew he could depend upon her to deal with the situation.
to be sure or expect that something will happen
Example:
- Depend upon it (= you can be sure) we won't give up.
- Can we depend on you coming in on Sunday?
- You can depend on his coming in on Sunday.
- You can depend on her to be (= she always is) late.
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