A length of time.
A length of time in history seen as a single coherent entity; an epoch, era.
The punctuation mark “.” (indicating the ending of a sentence or marking an abbreviation).
A decisive end to something; a stop.
The length of time during which the same characteristics of a periodic phenomenon recur, such as the repetition of a wave or the rotation of a planet.
Female menstruation; an episode of this.
Female menstruation; an episode of this.
A section of an artist's, writer's (etc.) career distinguished by a given quality, preoccupation etc.
Each of the divisions into which a school day is split, allocated to a given subject or activity.
Each of the intervals, typically three, of which a game is divided.
One or more additional intervals to decide a tied game, an overtime period.
(obsolete) The length of time for a disease to run its course.
An end or conclusion; the final point of a process, a state, an event, etc.
A complete sentence, especially one expressing a single thought or making a balanced, rhythmic whole.
(obsolete) A specific moment during a given process; a point, a stage.
A row in the periodic table of the elements.
A geochronologic unit of millions to tens of millions of years; a subdivision of an era, and subdivided into epochs.
A Drosophila gene, the gene product of which is involved in regulation of the circadian rhythm.
Two phrases (an antecedent and a consequent phrase).
The length of an interval over which a periodic function, periodic sequence or repeating decimal repeats; often the least such length.

Designating anything from a given historical era.
Evoking, or appropriate for, a particular historical period, especially through the use of elaborate costumes and scenery.

That's final; that's the end of the matter (analogous to a period ending a sentence); end of story.

(obsolete) To come to a period; to conclude.
(obsolete) To put an end to.
(colloquial) To menstruate; to excrete menstrual blood.

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During this period Governors of Victoria lived at Stonington mansion.