Function: noun
Date: 1933
: a question (as isn't it in “ it's fine, isn't it? ” ) added to a statement or command (as to gain the assent of or challenge the person addressed) also : a sentence ending in a tag question
TAG QUESTION
Meaning of TAG QUESTION in English
Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012