: something that is saved and used for a particular purpose; especially : a program that requires jobs, money, etc., to be saved for people who have not been given as much as others in the past
: a plan in the European Union in which farmers are paid not to grow a certain crop on a piece of land so that the price for that crop will not decrease too much
: a piece of land on which the crop is not grown
What made you want to look up set-aside? Please tell us where you read or heard it (including the quote, if possible).