| period | a punctuation mark (.) placed at the end of a declarative sentence to indicate a full stop or after abbreviations |
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| period | the monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause |
| period | an amount of time |
| period | the end or completion of something |
| period | a unit of geological time during which a system of rocks formed |
| period | one of three periods of play in hockey games |
| period | the interval taken to complete one cycle of a regularly repeating phenomenon |
| period | a stage in the history of a culture having a definable place in space and time |
| period | (in games or plays or other performances) the time during which play proceeds |
| period | an amount of time |
| period | any work of art whose special value lies in its evocation of a historical period |
| period | recurring or reappearing from time to time |