principal

/pʁɛ̃.si.pal/
1.
adjectiveSing

main

primary

chief

Notre objectif principal est de réduire les émissions de CO2.

Our main objective is to reduce CO2 emissions.

2.
nounmasculineSing

the main thing

the essential point

L'important, c'est de participer ; c'est ça le principal.

The important thing is taking part; that's the main point.

3.
nounmasculineSing

the head of a collège (middle school) — school principal

Au collège, le principal a convoqué les parents.

At the middle school, the principal called the parents in.