Used in school contexts to refer to the first class of the day.
The first period is math class.
I was late for the first period.
Second period; follows the same pattern with other numbers.
Synonym meaning 'first period', slightly more explicit about the time unit.
Standard kanji spelling.
Numerical variant using half-width digit.
Compound of 一 (いち, 'one') + 限目 (げんめ, 'period'). 限目 is a suffix used to count class periods.