believe

verb be·lieve \bə-ˈlēv\

: to accept or regard (something) as true

: to accept the truth of what is said by (someone)

: to have (a specified opinion)

be·lievedbe·liev·ing

Full Definition of BELIEVE

intransitive verb

a : to have a firm religious faith

b : to accept something as true, genuine, or real <ideals we believe in> <believes in ghosts>

: to have a firm conviction as to the goodness, efficacy, or ability of something <believe in exercise>

: to hold an opinion : think

transitive verb

a : to consider to be true or honest <believe the reports> <you wouldn't believe how long it took>

b : to accept the word or evidence of <couldn't believe my ears>

: to hold as an opinion : suppose

— be·liev·er noun

— not believe

: to be astounded at

See believe defined for English-language learners

See believe defined for kids

Examples of BELIEVE

I have watched the many ways that teachers demonstrate pleasure in what students have said or done. I used to believe that teachers needed to present a stoic face for fear of losing control—as if smiling caused bad behavior. —Nancy Mack, English Journal, September 2008
Scientists kept a close eye on Mount Saint Helens. The volcano in Washington State spewed steam and ash throughout the month, leading experts to believe that it could erupt at any time. —Time For Kids, 17 Dec. 2004
They parted as casually as any friends who believe they will meet in a few days. But each knew the other was in deadly peril of his life. —Esther Forbes, Johnny Tremain, 1943
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Origin of BELIEVE

Middle English beleven, from Old English belēfan, from be- + lȳfan, lēfan to allow, believe; akin to Old High German gilouben to believe, Old English lēof dear — more at love

First Known Use: before 12th century