What is the meaning of Haber?

auxiliary verb to form compound tenses or perfect tenses, together with a past participle

to have, to posess

there be, the pronoun "i/bi" or "-ie/-bi" in final position are always required. See the derived terms.

have to, be necessary (to)

to introduce the time ago that something happened

shall; ought to; should [with de (+ infinitive) ‘do something’]

will; forms the future tense [with infinitive ‘do something’]

would; forms the conditional [with infinitive ‘do something’]

it has been ... since; ago (indicates the time since something occurred)

have; forms the perfect aspect [with masculine singular past participle]

to exist; “there is”, “there are” (hay); “there was”, “there were” (había)

to have to [with de (+ infinitive) ‘do something’]

to be necessary [with que (+ infinitive) ‘to do something’]

used to denote a past obligation

Source: wiktionary.org

See also