What is Block?

Legal Definition
A square or portion of a city or town enclosed by streets, whether partially or wholly occupied by buildings or containing only vacant lots. Ottawa v. Barney, 10 Kan. 270; Fraser v. Ott, 95 Cal. 661, 30 Pac. 793; State v. Deffes, 44 La. Ann. 164, 10 South. 597; Todd v. Railroad Co., 78 III. 530; Harrison v. People, 195 III. 46G, 63 N. El 191.
-- Black's Law Dictionary