1 [mass noun] the policy of taking land out of production to reduce crop surpluses:government subsidies could be an alternative to set-aside [as modifier]:grants for providing public access to set-aside land
land taken out of production under the set-aside policy:he has fifty acres of set-aside
2US a government contract awarded without competition to a minority-owned business.
3US a portion of funds reserved for a particular purpose.
set-aside in other Oxford dictionaries
Definition of set-aside in the US English dictionary