1. A rational motive for a belief or action (synset 109201896)
    "the reason that war was declared"; "the grounds for their declaration"
  2. An explanation of the cause of some phenomenon (synset 106752739)
    "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 (synset 105659525)
    "we are told that man is endowed with reason and capable of distinguishing good from evil"
  4. The state of having good sense and sound judgment (synset 114403234)
    "his rationality may have been impaired"; "he had to rely less on reason than on rousing their emotions"
  5. A justification for something existing or happening (synset 106753097)
    "he had no cause to complain"; "they had good reason to rejoice"
  6. A fact that logically justifies some premise or conclusion (synset 105827293)
    "there is reason to believe he is lying"
  1. Decide by reasoning;
    Draw or come to a conclusion (synset 200636134)
    "We reasoned that it was cheaper to rent than to buy a house"
  2. Present reasons and arguments (synset 200774234)
  3. Think logically (synset 200634289)
    "The children must learn to reason"

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