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The Collaborative International Dictionary
To act for

Act \Act\, v. i.

  1. To exert power; to produce an effect; as, the stomach acts upon food.

  2. To perform actions; to fulfill functions; to put forth energy; to move, as opposed to remaining at rest; to carry into effect a determination of the will.

    He hangs between, in doubt to act or rest.
    --Pope.

  3. To behave or conduct, as in morals, private duties, or public offices; to bear or deport one's self; as, we know not why he has acted so.

  4. To perform on the stage; to represent a character.

    To show the world how Garrick did not act.
    --Cowper.

    To act as or To act for, to do the work of; to serve as.

    To act on, to regulate one's conduct according to.

    To act up to, to equal in action; to fulfill in practice; as, he has acted up to his engagement or his advantages.

    to act up, to misbehave

Usage examples of "to act for".

Mrs Morden gave me back Ivan's open- sesames and requested me, in my turn, to sign an authorisation for her to act for the brewery.

A few, unable to act for the searing pain, fell on the decks and rolled and writhed.