||As`si*en"to (?), n. [Sp. asiento
seat, contract or agreement, fr. asentar to place on a chair, to
adjust, to make an agreement; a (L. ad) + sentar, a
participial verb; as if there were a L. sedentare to cause to sit,
fr. sedens, sedentis, p. pr. of sed?re to sit.]
A contract or convention between Spain and other powers for furnishing
negro slaves for the Spanish dominions in America, esp. the contract made
with Great Britain in 1713.