What is Affect?

Legal Definition
To act upon; influence; change; enlarge or abridge. This word is often used in the sense of acting injuriously upon per-sens and things. Ryan v. Carter, 93 U. S. 84, 23 L. Ed. 807; Tyler v. Wells, 2 Mo. App. 538; Holland v. Digkerson, 41 Iowa, 373; United States v. Ortega, 11 Wheat. 467, 6 In Ed. 521.
-- Black's Law Dictionary