Webster's Revised Unabridged Dictionary · 1913

Hour

Hour , noun

[Old English hour, our, hore, ure, Old French hore, ore, ure, French heure, Latin hora, from Greek {not transcribed}, orig., a definite space of time, fixed by natural laws; hence, a season, the time of the day, an hour. See Year, and compare Horologe, Horoscope.]

1.
The twenty-fourth part of a day; sixty minutes.
2.
The time of the day, as expressed in hours and minutes, and indicated by a timepiece; as, what is the hour? At what hour shall we meet?
3.
Fixed or appointed time; conjuncture; a particular time or occasion; as, the hour of greatest peril; the man for the hour.
Woman,... mine hour is not yet come. — John ii. 4
This is your hour, and the power of darkness. — Luke xxii. 53
4.
(Roman Catholic Church) Certain prayers to be repeated at stated times of the day, as matins and vespers.
5.
A measure of distance traveled.
Vilvoorden, three hours from Brussels. — J. P. Peters
Collocations (11)
After hours , after the time appointed for one's regular labor.
Canonical hours , See under Canonical.
Hour angle (Astronomy) , the angle between the hour circle passing through a given body, and the meridian of a place.
Hour circle (Astronomy) , (a) Any circle of the sphere passing through the two poles of the equator; esp., one of the circles drawn on an artificial globe through the poles, and dividing the equator into spaces of 15°, or one hour, each. (b) A circle upon an equatorial telescope lying parallel to the plane of the earth's equator, and graduated in hours and subdivisions of hours of right ascension. (c) A small brass circle attached to the north pole of an artificial globe, and divided into twenty-four parts or hours. It is used to mark differences of time in working problems on the globe.
Hour hand , the hand or index which shows the hour on a timepiece.
Hour line (Astronomy) , A line indicating the hour. A line on which the shadow falls at a given hour; the intersection of an hour circle which the face of the dial.
Hour plate , the plate of a timepiece on which the hours are marked; the dial. — Locke
Sidereal hour , the twenty-fourth part of a sidereal day.
Solar hour , the twenty-fourth part of a solar day.
The small hours , the early hours of the morning, as one o'clock, two o'clock, etc.
To keep good hours , to be regular in going to bed early.