|Origin:||période, from Latin, from Greek, from peri- ( PERICARDIUM) + hodos 'way'|
pe‧ri‧od1 S3 W1 [countable]
a particular length of time with a beginning and an end:
length of time
Tomorrow's weather will be dry with sunny periods.
The drug was tested over a five-week period.
They adopted the system for a trial period (=time in which something is tested to see if it works well).
a particular time in someone's life or in history:
the conflict of the Cold War period
Van Gogh's early period
the Jurassic period
the behaviour of children during the period of adolescence
the flow of blood that comes from a woman's body each month [↪ menstrual period]:
I was twelve years old when I started my periods.
the mark (.), used in of writing to show the end of a sentence or of an abbreviation [= full stop British English]
one of the equal parts that the school day is divided into [= lesson British English]
What class do you have first period?
a double period of Science
one of the equal parts that a game is divided into in a sport such as ice hockey:
The Bruins scored twice in the first period.
used to emphasize that you have made a decision and that you do not want to discuss the subject any more [= full stop!]:
for emphasisAmerican English spoken
I'm not going, period!