Turnout means the total number of people who show up to vote or gather for an event. The success of democratic elections depends on voter turnout — how many people actually get out and vote.
Voter turnout is crucial in an election, but turnout is not always about politics. When ballet dancers talk about turnout, they're referring to their ability to rotate their legs outward from the hips down to the toes. A turnout is also a place in the road where cars can turn around.