a

used when referring to someone or something for the first time in a text or conversation.

used to indicate membership of a class of people or things.

in, to, or for each; per (used when expressing rates or ratios).

(in travel timetables) arrives.

(in units of measurement) atto- (10−18).

(with reference to sporting fixtures) away.

(used before a date) before.

acceleration.

not; without.

forming ancient or Latinized modern names of animals and plants.

forming names of oxides.

forming geographical names.

forming ancient or Latinized modern feminine forenames.

forming nouns from Italian, Portuguese, and Spanish.

to; towards.

forming plural nouns from Greek or Latin neuter plurals corresponding to a singular in -um or -on (such as addenda, phenomena ).

forming plural nouns in names (often from modern Latin) of zoological groups.

variant spelling of ad- assimilated before sc, sp, and st (as in ascend, aspire, and astringent ).

of.

have.

to.

of.

utterly.

the first letter of the alphabet.

a shape like that of a capital A.

the sixth note of the diatonic scale of C major. The A above middle C is usually used as the basis for tuning and in modern music has a standard frequency of 440 Hz.

(in card games) ace.

against (heading the column in a table of sports results which shows the goals or points scored against each club).

A level.

ampere(s).

ångstrom(s).

attack (in designations of US aircraft types).

answer.

(in names of sports clubs) Athletic.

Austria (international vehicle registration).

the SI base unit of electrical current.

a unit of length equal to one hundred-millionth of a centimetre, 10−10 metre, used mainly to express wavelengths and interatomic distances.