Webster's Revised Unabridged Dictionary · 1913

Be

Be (bē) , intransitive verb

[Old English been, beon, Anglo-Saxon beón to be, beóm I am; akin to Old High German bim, pim, German bin, I am, Gael. & Ir. bu was, Welsh bod to be, Lithuanian bu-ti, O. Slav. by-ti, to be, Latin fu-i I have been, fu-turus about to be, fo-re to be about to be, and perh. to fieri to become, Greek fy^nai to be born, to be, Sanskrit bhū to be. This verb is defective, and the parts lacking are supplied by verbs from other roots, is, was, which have no radical connection with be. The various forms, am, are, is, was, were, etc., are considered grammatically as parts of the verb “to be”, which, with its conjugational forms, is often called the substantive verb. r97. Compare Future, Physic.]

1.
To exist actually, or in the world of fact; to have existence.
to be
To be contents his natural desire. — Pope
To be, or not to be: that is the question. — Shakespeare
2.
To exist in a certain manner or relation, -- whether as a reality or as a product of thought; to exist as the subject of a certain predicate, that is, as having a certain attribute, or as belonging to a certain sort, or as identical with what is specified, -- a word or words for the predicate being annexed; as, to be happy; to be here; to be large, or strong; to be an animal; to be a hero; to be a nonentity; three and two are five; annihilation is the cessation of existence; that is the man.
3.
To take place; to happen; as, the meeting was on Thursday.
4.
To signify; to represent or symbolize; to answer to.
The field is the world. — Matt. xiii. 38
The seven candlesticks which thou sawest are the seven churches. — Rev. i. 20

The verb to be (including the forms is, was, etc.) is used in forming the passive voice of other verbs; as, John has been struck by James. It is also used with the past participle of many intransitive verbs to express a state of the subject. But have is now more commonly used as the auxiliary, though expressing a different sense; as, “Ye have come too late -- but ye are come. ” “The minstrel boy to the war is gone.” The present and imperfect tenses form, with the infinitive, a particular future tense, which expresses necessity, duty, or purpose; as, government is to be supported; we are to pay our just debts; the deed is to be signed to-morrow.

Have or had been, followed by to, implies movement. “I have been to Paris.” Sydney Smith. “Have you been to Franchard?” R. L. Stevenson.

Been, or ben, was anciently the plural of the indicative present. “Ye ben light of the world.” Wyclif, Matt. v. 14. Afterwards be was used, as in our Bible: “They that be with us are more than they that be with them.” 2 Kings vi. 16. Ben was also the old infinitive: “To ben of such power.” R. of Gloucester. Be is used as a form of the present subjunctive: “But if it be a question of words and names.” Acts xviii. 15. But the indicative forms, is and are, with if, are more commonly used.

Collocations (4)
Be it so , a phrase of supposition, equivalent to suppose it to be so; or of permission, signifying let it be so. — Shakespeare
If so be , in case.
To be from , to have come from; as, from what place are you? I am from Chicago.
To let be , to omit, or leave untouched; to let alone. Let be, therefore, my vengeance to dissuade. — Spenser

Be-

[Anglo-Saxon be, and in accented form , akin to Old Saxon be and , Old High German bi, pi, and , Middle High German be and , German be and bei, Gothic bi, and perh. Greek 'amfi` about (compare Anglo-Saxon beseón to look about). r203. Compare By, Amb-.]

A prefix, originally the same word as by;
(a)
To intensify the meaning; as, bespatter, bestir.
(b)
To render an intransitive verb transitive; as, befall (to fall upon); bespeak (to speak for).
(c)
To make the action of a verb particular or definite; as, beget (to get as offspring); beset (to set around).

It is joined with certain substantives, and a few adjectives, to form verbs; as, bedew, befriend, benight, besot; belate (to make late); belittle (to make little). It also occurs in certain nouns, adverbs, and prepositions, often with something of the force of the preposition by, or about; as, belief (believe), behalf, bequest (bequeath); because, before, beneath, beside, between.
In some words the original force of be is obscured or lost; as, in become, begin, behave, behoove, belong.