A lot of thesaurus - A little bit dictionary

'topic'

Overview of noun topic
1. subject, topic, theme -- (the subject matter of a conversation or discussion; "he didn't want to discuss that subject"; "it was a very sensitive topic"; "his letters were always on the theme of love")

2. topic, subject, issue, matter -- (some situation or event that is thought about; "he kept drifting off the topic"; "he had been thinking about the subject for several years"; "it is a matter for the police")



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