What does the verb,"cement" mean in this sentence?
"Two young American women from California carved their initials and a full name into the Colosseum, then proceeded to cement the act in stone with a selfie of their handiwork."

In this sentence, I can't understand exactly what "cement" means. Could you explain to me?

Question

What does the verb,"cement" mean in this sentence?
"Two young American women from California carved their initials and a full name into the Colosseum, then proceeded to cement the act in stone with a selfie of their handiwork."

In this sentence, I can't understand exactly what "cement" means. Could you explain to me?

Answer

Basically it means to make something permanent.