terminal, final year (of high school)
Elle m'a eu en terminale.
She had me in my final year of high school.
— Quand passent les cigognes (1957)
C'est pour fêter mon passage en terminale !
It’s to celebrate moving up to the final year of high school!
— Y tu mamá también (2001)
La terminale.
The terminal.
Thomas est en terminale.
Thomas is in his final year of high school.
En terminale.
In the final year.