Definition of fifth noun from the Oxford Advanced American Dictionary

 

fifth

 noun
noun
NAmE//fɪfθ//
 
 
jump to other results
  • each of five equal parts of something She cut the cake into fifths. He gave her a fifth of the total amount.
  • Idioms
    take/plead the fifth
     
    jump to other results
    to make use of the right to refuse to answer questions in court about a crime, because you may give information that will make it seem that you are guilty From the Fifth Amendment of the U.S. Constitution, which guarantees this right.
    See the Oxford Advanced Learner's Dictionary entry: fifth