Longman Dictionary of Contemporary English homepage

Date: 1300-1400
Language: French
Origin: période, from Latin, from Greek, from peri- ( PERICARDIUM) + hodos 'way'

period

1 noun
     
pe‧ri‧od1 S3 W1 [countable]
1

length of time

a particular length of time with a beginning and an end:
Tomorrow's weather will be dry with sunny periods.
period of
His playing improved in a very short period of time.
a brief period of silence
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).
2

life/history

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
3

blood

HBH 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.
4

mark

American EnglishSLA the mark (.), used in of writing to show the end of a sentence or of an abbreviation [= full stop British English]
5

school

SES one of the equal parts that the school day is divided into [= lesson British English]
What class do you have first period?
period of
a double period of Science
6

sports

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.
7

for emphasis

period!

American English spoken used to emphasize that you have made a decision and that you do not want to discuss the subject any more [= full stop!]:
I'm not going, period!

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