What is Bill Quia Timet?

Legal Definition
A bill invoking the aid of equity "because he fears," that is, because the complainant apprehends an injury to his property rights or interests, from the fault or neglect of another. Such bills are entertained to guard against possible or prospective injuries, and to preserve the means by which existing rights may be protected from future or contingent violations ; differing from injunctions, in that the latter correct past and present or imminent and certain injuries. Bisp. Eq. § 568 ; 2 Story, Eq. Jur. § 826 ; Bniley v. South-wick, 6 Lans. (N. Y.) 364; Bryant v. Peteis, 3 Ala. 169 ; Randolph v. Kinney, 3 Rand. (Vat) 898.
-- Black's Law Dictionary
Legal Definition
A bill in equity filed by the owner of a future estate to prevent injury thereto. See 6 Lans. (N. Y.) 356.
-- Ballentine's Law Dictionary
Legal Definition
A Latin term referring to a bill to quiet title in the area of real property law.