Definitions for "exit poll"
Keywords:  poll, voter, voted, election, outcome
a survey poll taken by interviewing voters as they leave (exit) the polling place, to determine how they voted and for what reasons; -- it is usually taken by news media to learn at an early time (often before the balloting has finished) who the winners are, and sometimes the reasons for the voters' choices.
A poll asking people how they have voted just after they have left the polling station.
a poll of voters as they leave the voting place; usually taken by news media in order to predict the outcome of an election