Noun

• S: (n) time period, period of time, period (an amount of time) "a time period of 30 years"; "hastened the period of time of his recovery"; "Picasso's blue period"
• S: (n) period (the interval taken to complete one cycle of a regularly repeating phenomenon)
• S: (n) period ((ice hockey) one of three divisions into which play is divided in hockey games)
• S: (n) period, geological period (a unit of geological time during which a system of rocks formed) "ganoid fishes swarmed during the earlier geological periods"
• S: (n) period (the end or completion of something) "death put a period to his endeavors"; "a change soon put a period to my tranquility"
• S: (n) menstruation, menses, menstruum, catamenia, period, flow (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
• S: (n) period, point, full stop, stop, full point (a punctuation mark (.) placed at the end of a declarative sentence to indicate a full stop or after abbreviations) "in England they call a period a stop"