Wiktionary
vb. 1 (context transitive English) To ascribe existence to. 2 (context transitive English) To believe that (something) is right or desirable. 3 (context transitive English) To have confidence in the ability or power of.
WordNet
v. have a firm conviction as to the goodness of something; "John believes in oat bran"
Usage examples of "believe in".
What could they possibly be out of that this monster would care about, believe in?
I'd say the day is going to come when Hughie winds up on some shrinky-dink's couch, except that people like the Hobarts don't believe in shrinks, do they?
I mean, on some level he probably knows better, the way a kid knows better than to believe in Santa Claus once he gets to be eight or nine .
His ironic detachment suggested that he might be less committed to the cause that the others seemed to believe in.
But I'm a more benevolent deity than anything people believe in in the outside world.
She didn't believe in lying to children, but she wasn't about to try to explain exactly how she was feeling.
Is sometime difficult to believe in EnterpriseI have thought sometimes that perhaps all I must do is find right elevator and I go home.