To exist; have existence or being; possess reality; be the case; be true or real.To take place; occur; happen; come about: as, the wedding will be to-morrow; his birthday was last week; it was to be.Usually, be is a mere copula, or sign of predication, a link between a subject and a predicate.In metaphysics, to subsist in a state not necessarily amounting to actual existence; have the rudiments of existence. See being.An auxiliary verb denoting subsistence in or subjection to the mode of action or being expressed by the principal verb.An infinitive with to after be forms a sort of future, often with a certain implication of obligation: thus, he is to come, they were to appear, she would have been to blame or to be blamed.n. The name of the second letter of the alphabet, usually written simply b or B. See B.Obsolete form of by. Chaucer.In chem., the symbol for beryllium (the same as glucinum).An inseparable prefix of verbs, and of nouns thence derived.An inseparable prefix of adverbs, which may also be used as prepositions or conjunctions.