catch sight of
US /kætʃ saɪt ʌv/
UK /kætʃ saɪt ʌv/

1.
avistar, ver de relance
to suddenly see something or someone, especially when you are looking for them
:
•
I managed to catch sight of the rare bird before it flew away.
Consegui avistar o pássaro raro antes que ele voasse.
•
She suddenly caught sight of her friend in the crowd.
Ela de repente avistou a amiga na multidão.