believe in

phrasal verb

Definition of believe in

1 : to have faith or confidence in the existence of (something) Do you believe in ghosts?
2 : to have trust in the goodness or value of (something) She believes in (the value of) regular exercise. I believe in working hard to achieve success. She doesn't believe in using pesticides.
3 : to have trust in the goodness or ability of (someone) Despite his problems, his parents still believe in him.

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