谈论 (tán lùn) is a transitive verb meaning 'to discuss' or 'to talk about' something — typically a topic, issue, or idea. It combines two characters with closely related meanings: 谈 (tán) means 'to speak' or 'to chat', often in a relaxed or informal way, while 论 (lùn) means 'to debate', 'to analyze', or 'to comment on', carrying a slightly more serious or analytical tone. Together, they form a standard, neutral-term verb for engaging in conversation about a subject — neither overly formal nor casual, making it widely usable in everyday speech, academic settings, and media.

The word usually appears with a direct object (e.g., 谈论这个问题 — 'discuss this issue') and is commonly used in both spoken and written Chinese. It does not imply agreement or disagreement — just the act of exchanging thoughts. Unlike one-character verbs like 说 (shuō) or 讲 (jiǎng), 谈论 emphasizes the mutual, topic-centered nature of the exchange and is rarely used without an explicit or implied object.