American English

Definition of as adverb from the Oxford Advanced American Dictionary



    , NAmE//æz//
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  1. 1as… as… used when you are comparing two people or things, or two situations You're as tall as your father. He was as white as a sheet. She doesn't play as well as her sister. I haven't known him as long as you (= as you have known him). He doesn't earn as much as me. He doesn't earn as much as I do. It's not as hard as I thought. Run as fast as you can. We'd like it as soon as possible.
  2. 2used to say that something happens in the same way As always, he said little. The “h” in honest is silent, as in “hour.”
Which Word?as / like You can use both as and like to say that things are similar. Like is a preposition and is used before nouns and pronouns:He has blue eyes like me. As is a conjunction and an adverb and is used before a clause, another adverb, or a phrase beginning with a preposition:She enjoys all kinds of music, as do I. As always, he said little. In spoken English, like is frequently used as a conjunction or an adverb instead of as:Nobody understands him like I do. I don’t want to upset him again like before.It is also used instead of as if:It looks like we’re going to be late. You will find more help on the use of as and like in the entries for particular verbs, such as act, behave, etc.
See the Oxford Advanced Learner's Dictionary entry: as