Forethink \Fore*think"\, v. t. 1. To think beforehand; to anticipate in the mind; to prognosticate. [Obs.] The soul of every man Prophetically doth forethink thy fall. --Shak. 2. To contrive (something) beforehend. [Obs.] --Bp. Hall. Forethink \Fore*think"\, v. i. To contrive beforehand. [Obs.]