'District attorney' definitions:

Definition of 'district attorney'

noun

An official prosecutor for a judicial district [syn: district attorney, DA]

From: GCIDE

District \Dis"trict\, n. [LL. districtus district, fr. L. districtus, p. p. of distringere: cf. F. district. See Distrain.]
1. (Feudal Law) The territory within which the lord has the power of coercing and punishing. [1913 Webster]
2. A division of territory; a defined portion of a state, town, or city, etc., made for administrative, electoral, or other purposes; as, a congressional district, judicial district, land district, school district, etc. [1913 Webster]
To exercise exclusive legislation . . . over such district not exceeding ten miles square. --The Constitution of the United States. [1913 Webster]
3. Any portion of territory of undefined extent; a region; a country; a tract. [1913 Webster]
These districts which between the tropics lie. --Blackstone. [1913 Webster]
Congressional district. See under Congressional.
District attorney, the prosecuting officer of a district or district court.
District court, a subordinate municipal, state, or United States tribunal, having jurisdiction in certain cases within a judicial district.
District judge, one who presides over a district court.
District school, a public school for the children within a school district. [U.S.]
Syn: Division; circuit; quarter; province; tract; region; country. [1913 Webster]