Period

Period has different meanings.

 Period (punctuation), a punctuation mark, also called a full stop
 Period (female menstruation)
 Period (geology), a series of rock strata, and the time during which the rocks were laid down
 The time it takes to finish one sequence of something that happens again and again
 Orbital period
 Periodic function
 The time it takes to play  of an ice hockey game
 A row in the periodic table