Topic/ˈtɑːpɪk/ Definition 1 of 3Pro Tip 1/3Conversation Starter Use 'topic' to introduce what you want to talk about or shift to a new subject. Let's change the topic. Have you traveled recently? Pro Tip 2/3Stay Relevant Make sure the topic relates to the conversation. Going off-topic confuses the listener. We're getting off topic; let's focus on the issue at hand. Pro Tip 3/3Debate Subject A 'hot topic' is a subject with lots of current interest and debate. Climate change is a hot topic right now.