as1 / az/ • adv. (usu. as —— as) used in comparisons to refer to the extent or degree of something: hailstones as big as tennis balls go as fast as you can. ∎ used to emphasize an amount: as many as twenty-two rare species.• conj. 1. used to indicate that something happens during the time when something is taking place: Frank watched him as he ambled through the crowd.2. used to indicate by comparison the way that something happens or is done: dress as you would if you were having guests [as adv.] she kissed him goodbye, as usual. ∎ used to add or interject a comment relating to the statement of a fact: as you can see, I didn't go after all.3. because; since: I must stop now as I have to go out.4. even though: sweet as he is, he doesn't pay his bills.• prep. 1. used to refer to the function or character that someone or something has: he got a job as a cook.2. during the time of being (the thing specified): he had often been sick as a child.PHRASES: as for with regard to: as for you, you'd better be quick.as if (or as though) as would be the case if: she behaved as if he weren't there.as if! inf. I very much doubt it: You know how lottery winners always say it won't change their lives? Yeah, as if!as (it) is in the existing circumstances: I've got enough on my plate as it is.as it were in a way (used to be less precise): areas that have been, as it were, pushed aside.as long assee long1 .as muchsee much.as of used to indicate the time or date from which something starts: I'm on unemployment as of today.as persee per.as suchsee such.as thoughsee as if above.as to with respect to; concerning: decisions as to which patients receive treatment.as wellsee well1 .as yet until now or a particular time in the past: the damage is as yet undetermined.as2 / as/ • n. (pl. as·ses) an ancient Roman copper coin.
AS • abbr. ∎ American Samoa. ∎ Anglo-Saxon. ∎ Associate in Science.