1. adjective /ˈpɪərɪəd/
Appropriate for a given historical era.
As the guests arrived — there were about a hundred, a majority in period attire — I began to feel out of place in my beige summer suit, white shirt, and red necktie. Then I got over it. I certainly didnt suffer from Confederate-uniform envy.
2. interjection /ˈpɪərɪəd/
And nothing else; and nothing less; used for emphasis.
When I say "eat your dinner," it means "eat your dinner," period!
3. noun /ˈpɪərɪəd/
All comes to one period, whether man make an end of himselfe, or whether he endure it [...].
Food rationing continued in the post-war period.
Wikipedia foundation.