a nonempty collection of sets having the properties that the union of two sets of the collection is a set in the collection and that the relative complement of each set with respect to any other set is in the collection.
Mathematics, symmetric difference.
to lift or raise by pushing from behind or below. to advance or aid by speaking well of; promote: She always boosts her hometown. to increase; raise: to boost prices; to boost the horsepower of the car by 20 percent. Slang. to steal, especially to shoplift: Two typewriters were boosted from the office last night. […]
Also, bootie. a baby’s socklike shoe, usually knitted or crocheted, and calf-length or shorter. any boot having a short leg. bootie (def 1). Historical Examples The Library of Work and Play: Needlecraft Effie Archer Archer Fanny Herself Edna Ferber Beehive for Bairns, Vol. 2 Various Handbook of Wool Knitting and Crochet Anonymous noun a soft […]