(rare or no longer productive) In, on, at; used to show a state, condition, or manner. Also passing into sense 2. / (no longer productive) In, into. Also passing into sense 5.

(no longer productive) Forming words with the sense of wholly, or utterly out.

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

A rank, normally the highest rank, on any of various scales that assign letters. / (education) The highest letter grade assigned (disregarding plusses and minuses).

(Australia, simile, informal) Very dry, extremely dry. / (Australia, simile, informal) Very thirsty.

Ace. (including in card games) / Acre. / Adult; as used in film rating. / Ammeter. / (physics) Angstrom. / Answer. / (sports) An assist. / (sexuality) Asexual. / (UK, London) Arsehole. / (weaponry) Atom.

The ordinal number first, derived from this letter of the English alphabet, called a and written in the Latin script.

(idiomatic, informal) A level of effort beyond what one can usually sustain; great exertion.

In the style or manner of.

(informal, idiomatic) To hurry up, to get moving.