period

(noun) an amount of time. Synonyms: time period, period of time. Examples: "A time period of 30 years." "Hastened the period of time of his recovery." "Picasso's blue period."

(noun) the interval taken to complete one cycle of a regularly repeating phenomenon.

(noun) (ice hockey) one of three divisions into which play is divided in hockey games.

(noun) a unit of geological time during which a system of rocks formed. Synonyms: geological period. Example: "Ganoid fishes swarmed during the earlier geological periods."

(noun) the end or completion of something. Examples: "Death put a period to his endeavors." "A change soon put a period to my tranquility."

(noun) the monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause. Synonyms: menstruation, menses, menstruum, catamenia, flow. Examples: "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."

(noun) a punctuation mark (.) placed at the end of a declarative sentence to indicate a full stop or after abbreviations. Synonyms: point, full stop, stop, full point. Example: "In england they call a period a stop."