Definition of March noun from the Oxford Advanced American Dictionary

  

March

 noun
noun
NAmE//mɑrtʃ//
 
[uncountable, countable](abbreviation Mar.)
 
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  •  the 3rd month of the year, between February and April To see how March is used, look at the examples at April.
  • Idioms
    (as) mad as a hatter/a March hare(informal)
     
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    (of a person) mentally ill; very silly From the Mad Hatter, a character in Lewis Carroll's Alice's Adventures in Wonderland. Because of the chemicals used in hat-making, workers often suffered from mercury poisoning, which can cause loss of memory and damage to the nervous system. A March hare was called mad because of the strange behavior of hares during the mating season.
    See the Oxford Advanced Learner's Dictionary entry: March