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as - definition and synonyms


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adverb, conjunction, preposition strongas pronunciation in American English /æz/ weakas pronunciation in American English /əz/
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As can be used in the following ways:
as a conjunction (connecting two clauses): As I was leaving, the phone rang.The results were not as bad as I had expected.
as a preposition (followed by a noun): He works as a waiter.
as an adverb (followed by an adjective, an adverb, or a word such as “much” or “many”): Nylon is cheaper than leather, and it’s just as strong.
  1. 1
    used for showing comparison
    1. a.
      used for comparing one person, thing, or situation with another
      as...as: Simon isn’t as tall as his brother.
      I don’t play football as much as I used to.
      I can’t run as fast as you.
      just as: We all need regular exercise, but a healthy diet is just as important.
      half/twice/three times etc. as much: A house in San Francisco costs twice as much as a similar house in some nearby cities.
      the same as: Barbara’s suggestion was almost exactly the same as mine.
    2. b.
      used in particular expressions for emphasizing a quality in someone or something
      Her skin was white as snow.
      He’s as tough as nails.
    See also less
  2. 2
    spoken used for mentioning that something is already known or has already been talked about
    As I was saying, we expect next year to be a good year.
    As everyone knows, the farming industry is in serious difficulties.
  3. 3
    used for saying that something happens or is done in the same way
    I invested the money as you suggested.
    Leave everything just as you found it.
    as usual: Judith was late, as usual.
  4. 4
    used for referring to what someone or something does or how they appear
    As chief executive, I am expected to provide effective leadership.
    a portrait of the actor as a child
    An electric drill can also be used as a screwdriver.
  5. 5
    used for saying that someone or something is considered or described in a particular way
    Van Dyck was regarded as the greatest painter of his time.
    The result of the vote is being seen as a personal victory for the Prime Minister.
    as being/having: Madeira is described as having the best climate in the world.
  6. 6
    used for saying that something happens at the same time as something else
    As we were sitting down to dinner, the phone rang.
    just as: We got to the check-in desk just as they were about to close.
  7. 7
    used for giving the reason for something
    As it was getting late, we decided to go home.
    We chose Doug to lead us as he said he knew the way.
  8. 8
    used after an adjective or adverb to mean that something is true despite what you are saying
    Strange as it may seem, I never really wanted to be rich.
    Much as I sympathize with your difficulties, there is little I can do to help you.



a course of study which is much shorter than a university course and focuses on the skills you need for a job, especially computer-related skills

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an ancient Roman system of underfloor heating, used to heat houses with hot air; from the Latin 'hypocaustum'

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