Referring to the subject or topic being discussed.

चर्चा का विषय

English Usage: "Talking of the weather, it's been unusually warm lately."

Hindi Usage: "मौसम की चर्चा करते हुए, हाल ही में असामान्य रूप से गर्मी रही है।"

To engage in conversation.

बातचीत करना

English Usage: "They were talking of their plans for the weekend."

Hindi Usage: "वे सप्ताहांत की योजनाओं के बारे में बातचीत कर रहे थे।"

A discussion or chat about a particular topic.

चर्चा

English Usage: "The talk of the town is the new restaurant that opened."

Hindi Usage: "नगर की चर्चा नए रेस्तरां के बारे में है जो खुला है।"