Definitions
1.nounSubject; theme; a category or general area of interest."A society where a topic cannot be discussed, does not have free speech."
2.nounDiscussion thread.
3.nounA musical sign intended to suggest a particular style or genre.
4.nounAn argument or reason.
5.nounAn external local application or remedy, such as a plaster, a blister, etc.
6.adjectiveTopical