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

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

(inorganic chemistry) Either of two oxyanions of iodine; any salt containing these anions

The process of categorizing something (e.g. history) into named periods.

Recurrence of a woman's periods; menstruation. / The quality of being periodic; tendency to recur at regular intervals.

plural of period

plural of periodical

plural of periodicity

simple past tense and past participle of period

present participle of period