Meaning of THEOREM in English

THEOREM

theo ‧ rem /ˈθɪərəm $ ˈθiːə-/ BrE AmE noun [countable]

[ Word Family: noun : ↑ theorist , ↑ theory , ↑ theorem , theoretician; verb : ↑ theorize ; adverb : ↑ theoretically ; adjective : ↑ theoretical ]

[ Date: 1500-1600 ; Language: Late Latin ; Origin: theorema , from Greek , from theorein ; ⇨ ↑ theory ]

technical a statement, especially in mathematics, that you can prove by showing that it has been correctly developed from facts ⇨ proof

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.