reason (n.)

  1. a rational motive for a belief or action; the reason that war was declared; the grounds for their declaration

    [ Syn: ground ]

  2. an explanation of the cause of some phenomenon; the reason a steady state was never reached was that the back pressure built up too slowly'

  3. the capacity for rational thought or inference or discrimination; we are told that man is endowed with reason and capable of distinguishing good from evil

    [ Syn: understanding , intellect ]

  4. the state of having good sense and sound judgment; his rationality may have been impaired; he had to rely less on reason than on rousing their emotions

    [ Syn: rationality , reasonableness ]

  5. a justification for something existing or happening; he had no cause to complain; they had good reason to rejoice

    [ Syn: cause , grounds ]

  6. a fact that logically justifies some premise or conclusion; there is reason to believe he is lying'

    reason (v.)

  1. decide by reasoning; draw or come to a conclusion; We reasoned that it was cheaper to rent than to buy a house

    [ Syn: reason out , conclude ]

  2. present reasons and arguments

    [ Syn: argue ]

  3. think logically; The children must learn to reason'

The dictionary is based on the WordNet Electronic Lexical Database.
WordNet 3.0 Copyright 2011 by Princeton University. All rights reserved.