From Longman Dictionary of Contemporary Englishbelieve in somebody/something phrasal verb1 BELIEVEto be sure that someone or something exists Do you believe in God?2 APPROVEto 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 BELIEVEto 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. → believe→ See Verb table
Examples from the Corpus
believe in • They're proving they exist, punishing us for not believing in them, like gods.• Even the state believes in it, quite apart from the academics themselves.• But Franca believed in none of these things.• I'd believed in that too much.• Al-Farabi did not believe in the immortality of the soul.• I believe in the information age and the global economy.• Citizens perceive their relationship to one another and they believe in their capacity to act.believe in doing something• They believe in maintaining small class sizes.• A: Just believe in yourself.• Al-Farabi did not believe in the immortality of the soul.• But Franca believed in none of these things.• Citizens perceive their relationship to one another and they believe in their capacity to act.• Even the state believes in it, quite apart from the academics themselves.• I'd believed in that too much.• I believe in the information age and the global economy.• They're proving they exist, punishing us for not believing in them, like gods. 