believe in somebody/something phrasal verb (see also believe)

1. to be sure that someone or something exists:
Do you believe in God?

2. to think that something is effective or right:
I don’t believe in these diets.
believe in doing something
The school believes in letting children learn at their own pace.

3. to trust someone and be confident that they will be successful:
The people want a president they can believe in.
Believe in yourself, or you’ll never succeed.

[TahlilGaran] Dictionary of Contemporary English ▲