from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A question used after a statement when seeking or expecting confirmation of that statement, as wasn't he in He was here, wasn't he?
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A question inviting the listener to indicate agreement, formed by adding a “tag” word or expression to a statement. For example “You love me, don’t you?”.
Sorry, no etymologies found.