(music) the musical period of time following the Baroque period and preceding the Romantic period, spanning c.1750-c.1820.

plural of periodic function

(music) the musical period of time following the Classical period falling between about 1820 and the start of the twentieth century.

(education) A high school class that is offered early in the morning, before the scheduled start of the school day.

Pain felt in the abdomen during menstruation.

Synonym of time period

(communism, history) According to an obsolete theory, a period shortly after the Great Depression in which capitalism would be marked by further crises and then soon collapse.

A subdivision of the Devonian system of America

(historical) The period of Egyptian history from the end of the Third Intermediate Period to the conquest of Egypt by Alexander the Great (the 26th through 31st dynasties), characterized by alternating periods of native and Persian rule.

The length of time during which an activity occurs or a condition remains. It may be measured either in seconds or in millions of years, depending upon the nature of the activity of condition being considered.