American English

Definition of trimester noun from the Oxford Advanced American Dictionary

     

    trimester

     noun
    noun
    NAmE//traɪˈmɛstər//
     
    , NAmE//ˈtraɪmɛstər//
     
     
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  1. 1(medical) a period of three months during the time when a woman is pregnant the first trimester of pregnancy
  2. 2 one of the three periods in the year during which classes are held in schools, universities, etc. The school year is divided into three trimesters. compare semester
See the Oxford Advanced Learner's Dictionary entry: trimester