Definitions:
a period of time equal to a twenty-fourth part of a day and night and divided into 60 minutes

a time of day specified as an exact number of hours from midnight or midday

a fixed period of time for an activity, such as work, use of a building, etc.

(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

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