Law. [L., the first words of the clause qui tam pro domino rege quam pro se ipso sequitur ‘who as well for the lord the king as for himself sues.’] An action brought on a penal statute by an informer, who sues for the penalty both on his own behalf and on that of the crown. b. transf. An informer.

1

1755.  Chesterf., in World, No. 105. An action popular, or of qui tam, would certainly lie.

2

1783.  Chron., in Ann. Reg., 213/2. An action was tried brought by qui tam on the statute of usury.

3

1816.  ‘Quiz,’ Grand Master, III. 63. While the qui tams abuse each other, From hangman Murtagh to ——.

4

  attrib.  1803.  Med. Jrnl., x. 170. Whatever certainty is required in an indictment, the same is necessary in a qui tam information.

5

1812.  Sporting Mag., XXXIX. 23. Amongst … these are some qui tam gentry.

6

1853.  T. I. Wharton, Pennsylv. Digest (ed. 6), II. 17. Qui tam informations are in the nature of civil suits.

7