DETERMINATION. The end, the conclusion, of a right or authority; as, the determination of a lease. 1 Com. Dig. Estates by Grant, G 10, 11, and 12.. The determination of an authority is the end of the authority given; the end of the return day of a writ determines the authority of the sheriff; the death of the principal determines the authority of a mere attorney. By determination is also understood the decision or judgment of a court of justice.