What is Return Of Writs?

Legal Definition
The privilege of return of writs, in medieval England, was a right given to certain liberties or franchises to execute royal writs within the land in question. This in effect meant overpassing the authority normally held by the sheriff as the king's representative in the localities. Examples of such liberties in medieval England include the palatine counties (see county palatine) County Durham, Cheshire and the Duchy of Lancaster.
-- Wikipedia
Legal Definition
Practice. A short account in writing, made by the sheriff, or other ministerial officer, of the manner in which he has executed a writ. Steph. on Pl. 24.

2. It is the duty of such officer to return all writs on the return day; on his neglecting to do so, a rule may be obtained on him to return the writ and, if he do not obey the rule, he may be attached for contempt. See 19 Vin. Ab. 171; Con]. Dig. Return; 2 Lilly's Abr. 476; Wood. b. 1, c. 7; 1 Penna. R. 497; 1 Rawle, R. 520; 3 Yeates, 17; 3 Yeates, 47; 1 Dall. 439.
-- Bouviers Law Dictionary
Legal Definition
In practice. A short account, in writing, made by the sheriff, or other ministerial officer, of the manner in which he has executed a writ. Steph. PI. 24.
-- Black's Law Dictionary