WordWeb Online

1. An amount of time
   "a time period of 30 years"; "hastened the period of time of his recovery"; "Picasso's blue period";
   - time period, period of time, time span
    
2. The interval taken to complete one cycle of a regularly repeating phenomenon
    
3. A unit of geological time during which a system of rocks formed
   "ganoid fishes swarmed during the earlier geological periods";
   - geological period
    
4. The end or completion of something
   "death put a period to his endeavours"; "a change soon put a period to my tranquility"
    
5. The monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause
   - menstruation, menses, menstruum, catamenia, flow
    
6. A punctuation mark (.) placed at the end of a declarative sentence to indicate a full stop or after abbreviations
   - point, full stop, stop, full point [Brit, rare]
    
7. (ice hockey) one of three divisions into which play is divided in hockey games

Derived forms: periods

Type of: discharge, division, emission, end, ending, expelling, fundamental measure, fundamental quantity, geologic time, geological time, interval, part, punctuation, punctuation mark [Brit], section, time interval

Part of: era, geological era, period of play, play, playing period

Encyclopedia: Period