Hour Definition

our
hours
noun
hours
A division of time, one of the twenty-four parts of a day; sixty minutes.
Webster's New World
One of the twelve points on a clock, watch, etc. marking the beginning or end of such a division.
The ninth hour.
Webster's New World
The time of day as indicated by a timepiece.
The hour is 4:30 a.m.
Webster's New World

The time of day as reckoned in military time.

Departure is scheduled for 0100 hours.
Webster's New World
A unit of measure of longitude or right ascension, equal to 15° or124 of a great circle.
American Heritage
Synonyms:
abbreviation

Singular: h., hr.

Wiktionary

Plural: h., hrs.

Wiktionary
idiom
long hours
  • A longer than usual or customary period of time for a given activity:

    worked long hours to finish the project on time.

American Heritage
after hours
  • after the regular hours for business, school, etc.
Webster's New World
bottom (<i>or</i> top) of the hour
Webster's New World
hour after hour
  • every hour or for many successive hours
Webster's New World
hour by hour
  • each hour
Webster's New World

Other Word Forms of Hour

Noun

Singular:
hour
Plural:
Hours

Idioms, Phrasal Verbs Related to Hour

Origin of Hour

  • Middle English houre, oure, from Anglo-Norman houre, from Old French houre, (h)ore, from Latin hōra (“hour”), from Ancient Greek ὥρα (hōrā, “any time or period, whether of the year, month, or day”), from Proto-Indo-European *yer-, *yor- (“year, season”). Akin to Old English ġēar (“year”). Displaced native Middle English stunde, stound (“hour, moment, stound”) (from Old English stund (“hour, time, moment”)), Middle English ȝetid, tid (“hour, time”) (from Old English *ġetīd, compare Old Saxon getīd (“hour, time”).

    From Wiktionary

  • Middle English from Old French houre from Latin hōra from Greek hōrā season, time yēr- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

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