top·ic 
/ˈtɑ:pɪk/ noun
plural top·ics /ˈtɑ:pɪk/ noun [count] : someone or something that people talk or write about : subject
▪ He is comfortable discussing a wide range of topics. ▪ a popular/hot topic ▪ topics such as health and fitness — often + of ▪ What is the topic of your speech? ▪ a book on the topic of language ▪ a topic of debate/discussion ▪ The new boss has been the main topic of conversation. — see also subtopic
▪ He is comfortable discussing a wide range of topics. ▪ a popular/hot topic ▪ topics such as health and fitness — often + of ▪ What is the topic of your speech? ▪ a book on the topic of language ▪ a topic of debate/discussion ▪ The new boss has been the main topic of conversation. — see also subtopic
