[ˈaʊə], (Noun)

Definitions:
- a period of time equal to a twenty-fourth part of a day and night and divided into 60 minutes
(e.g: an extra hour of daylight in the winter evenings)

- a time of day specified as an exact number of hours from midnight or midday
(e.g: the clock in the sitting room struck the hour)

- a fixed period of time for an activity, such as work, use of a building, etc.
(e.g: the dinner hour)

- (in the Western (Latin) Church) a short service of psalms and prayers to be said at a particular time of day, especially in religious communities
(e.g: an organized life of prayer including the canonical hours)

- 15° of longitude or right ascension (one twenty-fourth part of a circle)


Phrases:
- all hours
- keep late hours
- keep regular hours
- on the hour
- within the hour

Origin:
Middle English: from Anglo-Norman French ure, via Latin from Greek hōra ‘season, hour’