- The definition of an hour is sixty minutes, or a period of time.
- An example of an hour is the time that passes between 4 and 5 o'clock.
- An example of an hour is the dinner hour.
Hands of a clock approaching the hour.
hour definition by Webster's New World
- a division of time, one of the twenty-four parts of a day; sixty minutes
- one of the twelve points on a clock, watch, etc. marking the beginning or end of such a division: the ninth hour
- a point or period of time; specif.,
- a fixed point or period of time for a particular activity, occasion, etc.: the dinner hour
- an indefinite period of time of a specified kind: his finest hour
- a period fixed for work, receiving patients, etc.: office hours from 2 to 5
- the usual times for getting up or going to bed: to keep late hours
- the time of day as indicated by a timepiece or as reckoned from midnight to midnight, expressed in hours and minutes: arrival at 14:30 hours
- a measure of the distance usually covered in an hour: two hours from New York to Philadelphia by rail
- Astron. a sidereal hour; angular unit equaling 15° measured along the celestial equator
- Eccles. a canonical hour or the prayers then said
- ☆ Educ. a class session of approximately one hour: each hour of a course per week is a unit of academic credit
Origin: Middle English ; from Old French hore ; from Classical Latin hora ; from Classical Greek hōra, hour, time, period, season ; from Indo-European base an unverified form yē-, year, summer (; from an unverified form ei-, to go) from source year
hour definition by American Heritage Dictionary
noun Abbr. hr.
- One of the 24 equal parts of a day.
- a. One of the points on a timepiece marking off 12 or 24 successive intervals of 60 minutes, from midnight to noon and noon to midnight or from midnight to midnight.b. The time of day indicated by a 12-hour clock.c. hours The time of day determined on a 24-hour basis: 1730 hours is 5:30 P.M.
- A unit of measure of longitude or right ascension, equal to 15° or 1/24 of a great circle.
- a. A customary or fixed time: the dinner hour.b. hours A set period of time for a specified activity: banking hours.
- a. A particular time: their hour of need.b. A significant time: Her hour had come.c. The present time: the man of the hour.
- a. The work that can be accomplished in an hour.b. The distance that can be traveled in an hour.
- a. A single session of a school day or class.b. A credit hour.
- hours Ecclesiastical The canonical hours.
Origin: Middle English, from Old French houre, from Latin hōra, from Greek hōrā, season, time; see yēr- in Indo-European roots.
hour - Phrases/Idioms
hour after hour
hour by hour
of the hour
hour - Science Definition