pe·ri·od /ˈpɪrɪəd/ 名詞
1. A portion of time as limited and determined by some recurring or cyclic phenomenon, as by the completion of a revolution of one of the heavenly bodies; a division of time, as a series of years, months, or days, in which something is completed, and ready to recommence and go on in the same order; as, the period of the sun, or the earth, or a comet; the period of an electromagnetic wave is the time interval between maxima.
2. Hence: A stated and recurring interval of time; more generally, an interval of time specified or left indefinite; a certain series of years, months, days, or the like; a time; a cycle; an age; an epoch; as, the period of the Roman republic.
How by art to make plants more lasting than their ordinary period. --Bacon.
3. Geol. One of the great divisions of geological time; as, the Tertiary period; the Glacial period. See the Chart of Geology.
4. The termination or completion of a revolution, cycle, series of events, single event, or act; hence, a limit; a bound; an end; a conclusion.
So spake the archangel Michael; then paused,
As at the world's great period. --Milton.
Evils which shall never end till eternity hath a period. --Jer. Taylor.
This is the period of my ambition. --Shak.
5. Rhet. A complete sentence, from one full stop to another; esp., a well-proportioned, harmonious sentence. “Devolved his rounded periods.”
Periods are beautiful when they are not too long. --B. Johnson.
Note: ☞ The period, according to Heyse, is a compound sentence consisting of a protasis and apodosis; according to Becker, it is the appropriate form for the coordinate propositions related by antithesis or causality.
6. Print. The punctuation point [.] that marks the end of a complete sentence, or of an abbreviated word.
7. Math. One of several similar sets of figures or terms usually marked by points or commas placed at regular intervals, as in numeration, in the extraction of roots, and in circulating decimals.
8. Med. The time of the exacerbation and remission of a disease, or of the paroxysm and intermission.
9. Mus. A complete musical sentence.
The period, the present or current time, as distinguished from all other times.
Syn: -- Time; date; epoch; era; age; duration; limit; bound; end; conclusion; determination.
Pe·ri·od, v. i. To come to a period; to conclude. [Obs.] “You may period upon this, that,” etc.
Pe·ri·od v. t. To put an end to. [Obs.]
n 1: an amount of time; "a time period of 30 years"; "hastened
the period of time of his recovery"; "Picasso's blue
period" [syn: time period, period of time]
2: one of three periods of play in hockey games
3: a stage in the history of a culture having a definable place
in space and time; "a novel from the Victorian period"
[syn: historic period, historical period]
4: the interval taken to complete one cycle of a regularly
5: 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 [syn: menstruation,
menses, menstruum, catamenia, flow]
6: 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" [syn: point, full
stop, stop, full point]
7: a unit of geological time during which a system of rocks
formed; "ganoid fishes swarmed during the earlier
geological periods" [syn: geological period]
8: the end or completion of something; "death put a period to
his endeavors"; "a change soon put a period to my