What is the meaning of period?

noun

• An amount of time.
  • usage: "a time period of 30 years"; "hastened the period of time of his recovery"; "Picasso's blue period"
  • synonyms: time period, period of time
• The interval taken to complete one cycle of a regularly repeating phenomenon.
• Ice hockey. ( one of three divisions into which play is divided in hockey games)
• A unit of geological time during which a system of rocks formed.
  • usage: "ganoid fishes swarmed during the earlier geological periods"
  • synonyms: geological period
• The end or completion of something.
  • usage: "death put a period to his endeavors"; "a change soon put a period to my tranquility"
• The monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause."the women were sickly and subject to excessive menstruation"; "a woman does not take the gout unless her menses be stopped-Hippocrates; "the semen begins to appear in males and to be emitted at the same time of life that the catamenia begin to flow in females-Aristotle
  • synonyms: menstruation, menses, menstruum, catamenia, flow
• A punctuation mark (.) placed at the end of a declarative sentence to indicate a full stop or after abbreviations.
  • usage: "in England they call a period a stop"
  • synonyms: point, full stop, stop, full point