Used to express a strong, immediate attraction or recognition when meeting someone or seeing something. We just clicked at first sight, like we had been friends forever.
Pro Tip 2/3
Not Literal
It doesn't always mean the very first second, but rather the initial experience or early stages. The house seemed perfect at first sight, despite needing some repairs.
Pro Tip 3/3
Emotional Impact
Conveys an emotional or aesthetic response that occurs the moment you encounter something. The painting struck me at first sight; its colors were astounding.