This is the 970th most frequent French word.
tournant
Turning point; bend; pivotal.
Here, "tournant" is used metaphorically to mean a significant change or point in one's career.
C'était un tournant décisif dans sa carrière.
It was a turning point in his/her career.
In this sentence, "tournant" refers to a physical curve or turn in a road or path.
Prenez à gauche au tournant suivant.
Take a left at the next turn.
Here, "tournant" is used to describe a pivotal moment in the narrative of a movie.