top·i·cal / ˈtäpikəl/ • adj. 1. (of a subject) of immediate relevance, interest, or importance owing to its relation to current events: a wide variety of subjects of topical interest. ∎  relating to a particular subject; classified according to subject: annotated links to resources in eleven topical categories. ∎ Philately relating to the collecting of postage stamps with designs connected with the same subject.2. chiefly Med. relating or applied directly to a part of the body.• n. Philately a postage stamp forming part of a set or collection with designs connected with the same subject.DERIVATIVES: top·i·cal·i·ty / ˌtäpəˈkalitē/ n.top·i·cal·ly / -ik(ə)lē/ adv.

topical (top-ikăl) adj. local: used for the route of administration of a drug that is applied directly to the part being treated.