be

Dictionary definition · Be

have the quality of being; (copula, used with an adjective or a predicate noun)"John is rich"
be identical to; be someone or something"The president of the company is John Smith"
occupy a certain position or area; be somewhere"Where is my umbrella?"
have an existence, be extant"Is there a God?"
be identical or equivalent to"One dollar equals 1,000 rubles these days!"
form or compose"This money is my only income"
work in a specific place, with a specific subject, or in a specific function"He is a herpetologist"
represent, as of a character on stage"Derek Jacobi was Hamlet"
spend or use time"I may be an hour"
have life, be alive"Our great leader is no more"
to remain unmolested, undisturbed, or uninterrupted — used only in infinitive form"let her be"

Source: Open English WordNet (CC BY 4.0).