Punctuation
"Period" is the name of the
punctuation mark used to indicate the end of a sentence. (there! see that one! (these last two were
exclamation points, though))
Menstruation
"Period" is a
slang term, or
euphemism, for the part of a
woman's
menstrual cycle where she is
bleeding.
Society for Creative Anachronism
In the
SCA, "period" refers to the
time period that is studied by the
members ("pre-
17th Century," to be specific).
Cycles
"Period" is the amount of
time it takes an
object in orbit to return to its
starting location. Also used with
pendulums and other things with
cycles, such as
economics.