1.
dialogue, conversation, discussion
A face-to-face exchange of ideas between two or more parties. Often implies a serious or purposeful conversation rather than casual chatting.
Common patterns
対 (facing, mutual) + 話 (talk, speech).
Usage
対話 implies a meaningful, often formal exchange between parties. It is commonly used in political, diplomatic, and interpersonal contexts to describe constructive discussion aimed at mutual understanding. Compare with 会話, which refers to everyday conversation.