Definitions from Wiktionary ( )

▸ verb:  As an auxiliary verb:
▸ verb:  (auxiliary) Used with past participles of verbs to form the passive voice.
▸ verb:  Used with present participles of verbs to form the continuous aspect.
▸ verb:  (formal) Used with to-infinitives of verbs to express intent, obligation, appropriateness, or relative future occurrence.
▸ verb:  Used with past participles of certain intransitive verbs to form the perfect aspect.
▸ verb:  (African-American Vernacular, Caribbean, Ireland, auxiliary, not conjugated) To tend to do, often do; marks the habitual aspect.
▸ verb:  As a copulative verb:
▸ verb:  (with there, or dialectally it, as dummy subject) To exist.
▸ verb:  Used to indicate that the subject and object are identical or equivalent.
▸ verb:  Used to indicate that the subject is an instance of the predicate nominal.
▸ verb:  Used to indicate that the subject has the qualities described by an adjective, prepositional phrase.
▸ verb:  Used to indicate that the subject has the qualities described by a noun or noun phrase.
▸ verb:  Used to link a subject to a measurement.
▸ verb:  (with a cardinal numeral) Used to state the age of a subject in years.
▸ verb:  (with a dummy subject it) Used to indicate the time of day.
▸ verb:  (with since) Used to indicate passage of time since the occurrence of an event.
▸ verb:  (rare and regional, chiefly in the past tense) Used to link two noun clauses, the first of which is a day of the week, recurring date, month, or other specific time (on which the event of the main clause took place), and the second of which is a period of time indicating how long ago that day was.
▸ verb:  (often impersonal, with it as a dummy subject) Used to indicate ambient conditions such as weather, light, noise or air quality.
▸ verb:  (dynamic / lexical be, especially in progressive tenses, conjugated non-suppletively in the present tense, see usage notes) To exist or behave in a certain way.
▸ verb:  As an intransitive lexical verb:
▸ verb:  (now usually literary) To exist; to have real existence, to be alive.
▸ verb:  To remain undisturbed in a certain state or situation.
▸ verb:  To occupy a place.
▸ verb:  To occur, to take place.
▸ verb:  (in perfect tenses) Elliptical form of "be here", "go to and return from" or similar, also extending to certain other senses of "go".
▸ noun:  The name of the Cyrillic script letter Б / б.
▸ noun:  Initialism of Bachelor of Engineering.
▸ noun:  (linguistics) Initialism of Black English. [Any of several varieties of English spoken by or associated with Black people, especially people of African origin or in Africa.]
▸ noun:  Initialism of Buddhist Era. [A calendrical system dating from after the death of the Buddha (taken as 543 BCE).]
▸ noun:  Abbreviation of Berlin, a federal state of Germany. [The capital and largest city of Germany.]
▸ noun:  Abbreviation of Bengkulu, a province of Indonesia. [A province of Indonesia on the southwest coast of Sumatra.]
▸ adjective:  (medicine) Initialism of board-eligible.

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