What does ピリオド mean?
ピリオド is a Japanese noun meaning “period (esp. in European languages); full stop” in English. It can also be translated as “period (of time), period (interval of a game)” depending on context. It is written as ピリオド in hiragana, and piriodo in romaji. This word is part of JLPT N2 vocabulary.
Example sentence
文を書くときには、ふつう大文字で始め、ピリオド（.）、または感嘆符（!）、疑問符（?）、で終わる。
When writing a sentence, generally you start with a capital letter and finish with a period (.), an exclamation mark (!), or a question mark (?).