caught sight of, saw, realized, noticed
Suddenly, he caught sight of me.
Au beau milieu de cela, il aperçut quelqu'un sur le quai sombre.
In the midst of it all, he caught sight of someone on the dark platform.
— De tout cœur (1998)
He caught sight of the black pearl.
Soudain, elle aperçut Velmont qui s'approchait.
Suddenly, she spotted Velmont approaching.
Puis, se retournant, il aperçut ses cinq collègues du Reform-Club.
Then, turning around, he spotted his five colleagues from the Reform Club.
Elle essaya d'ouvrir la porte, mais s'aperçut que c'était impossible.
She tried to open the door, but realized it was impossible.