plural of hour-glass

(historical, obsolete) A unit of computing power equal to 1000 girl-hours.

(historical, obsolete) A unit of computing power in the context of 1940s–1970s technology equal to one female worker working for one hour, for example, writing code or entering data to punch cards.

plural of quarter of an hour

A unit of electrical energy equal to that done by one terawatt acting for one hour.

(chiefly US) An event, particularly on radio or television, showcasing the talents of amateur performers.

plural of hour change

The changing of clocks one hour forward or backward, in line with daylight saving time.

Alternative form of supper hour

Dinnertime, the hour in which the dinner meal takes place. / (Britain) The midday break in British schools (some areas), lunchtime.