topic is on the Academic Word List.

Pronunciation

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Singular
topic

Plural
topics

  1. (countable) A topic is a general idea that someone is speaking (reading, thinking, etc.) about at a specific time.
    We were talking about my problems. Don't change the topic.
    Our library has books on a wide range of topics.
    When you're writing for school, it's important to stay on topic, and not start talking about other things.
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