first period
nounUK /ˌfɜːst ˈpɪə.ri.əd/
US /ˌfɝːst ˈpɪr.i.əd/
The first class you go to at school each day.
My first period is math, so I have to be on time.
RELATED WORDS
OTHER MEANINGS
2. The first time a girl gets her monthly period.
She learned about her first period in health class.
3. The first stretch of play in a sports game.
Our team scored two goals in the first period.
4. The earliest stage or time of something.
The first period of the dinosaur age lasted millions of years.