n. A circuit: a round; hence, the time in which a circuit or revolution, as of a heavenly body, is made; the shortest interval of time within which any phenomenon goes through its changes of pass through them again immediately as before.n. Any round of time, or series of years, days, etc.n. An indefinite part of any continued state, existence, or series of events; an epoch: as, the first period of life; the last period of a king's reign; the period of the French revolution.n. The point of completion of a cycle of years or round or series of events; limit; end; conclusion; termination.n. Hence— The end to be attained; goal.n. In rhetoric, a complete sentence from one full stop to another; a passage terminated by a full pause.n. In ancient prosody, a group of two or more cola.n. In music, a definite and complete division of a composition, usually consisting of two or more contrasted or complementary phrases; a complete musical sentence.n. The point or character that marks the end of a complete sentence, or indicates an abbreviation, etc.; a full stop, thus(.).n. In math.: The smallest constant difference which, added to the value of a variable, will leave that of a function (of which it is said to be the period) unchanged.n. In vulgar arithmetic, one of several similar sets of figures or terms, marked by points or commas placed regularly after a certain number, as in numeration, in circulating decimals, and in the extraction of roots. Sometimes called degree.n. In medicine, one of the phases or epochs which are distinguishable in the course of a disease.n. Duration, continuance, term.n. Bound, determination.To put an end to.To end; cease.n. plural The menses.n. In physical, the time of one complete oscillation or cycle of a periodic motion; the reciprocal of the frequency of a periodic motion.n. In astronomy, the time of the revolution of a planet or satellite around its primary. Also orbital period.n. In geology, technically, one of the larger divisions of geologic time of either the second or the third order, measured by the time of deposition of a ‘group’ or ‘system’ of formations, and characterized by the presence of a number of allied and similar faunas which as a whole differ from those of other periods.