What is the meaning of A?

The first letter of the basic modern Latin alphabet.

an open front or central unrounded vowel.

[a]-coloring or a weak, fleeting, epenthetic or echo [a].

transliterates Indic अ (or equivalent).

See a-.

year, a unit of time.

1. Julian year, 365.25 days.

Julian year, 365.25 days.

An are, a unit of area one hundredth of a hectare; ares.

acceleration

Annuity; annuity-immediate.

The first letter of the English alphabet, written in the Latin script.

The name of the Latin script letter A/a.

An unspecified example of (something); the indefinite article.

One; used before score, dozen, hundred, thousand, million, etc.

Used in some phrases denoting quantity, such as a few, a good many, a couple, a little, a bit, etc.

Used before a numeral.

Used in some adverbial phrases denoting the degree or extent of an action, such as a little, a bit, a lot, etc.

The same; one and the same. Used in phrases such as of a kind, birds of a feather, etc.

Any; every; used before a noun which has become modified to limit its scope.

Any; used with a negative to indicate not a single one.

Used before an adjective that modifies a noun (singular or plural) delimited by a numeral.

One; someone named; used before a person's name, suggesting that the speaker knows little about the person other than the name.

Used before an adjective modifying a person's name, typically used to emphasize that person's current condition or emotional state.

Someone or something like; similar to; used before a proper noun to create an example out of it.

To do with separation; In, into.

To do with time; Each, per, in, on, by. Often occurs between two nouns, where the first noun occurs at the end of a verbal phrase.

To do with status; In.

To do with position or direction; In, on, at, by, towards, onto.

To do with process, with a passive verb; In the course of, experiencing.

To do with an action, an active verb; Engaged in.

To do with an action/movement; To, into.

To do with method; In, with.

To do with role or capacity; In.

Have (auxiliary verb).

had (auxiliary verb).

He, she, they: the third-person singular or plural nominative.

1. He, the third-person singular nominative.
2. She, the third-person singular nominative.

He, the third-person singular nominative.

She, the third-person singular nominative.

Of.

All.

All.

Pronunciation spelling of to.

Used to express a future action; going to.

Contraction of and.

Distance from leading edge to aerodynamic center.

specific absorption coefficient

specific rotation

allele (recessive)

across

Alternative spelling of a.m. (“ante meridiem”) or am

Alternative form of -a (“empty syllable added to songs, poetry, verse and other speech”).

The name of the Cyrillic script letter А/а.

ah; er (sound of hesitation)

The fourth semiquaver (sixteenth note) of a beat.

Source: wiktionary.org