Meaning of tag question

tag' ques"tion

Pronunciation: [key]
— Gram. Gram.
  1. Also calleda short interrogative structure appended to a statement or command, as isn't it in It's raining, isn't it?, are you in You're not going, are you?, or German nicht wahr.
  2. a question formed by appending such a structure to a declarative sentence or command, often inviting confirmation or assent, as She lives nearby, doesn't she? or Sit down, won't you?
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.