\Co*ac"tive\, a. [In sense 1, fr. 1st {Coact}; in sense
2, fr. 2d {Coact}.]
1. Serving to compel or constrain; compulsory; restrictive.
         Any coactive power or the civil kind. --Bp.
                                               Warburton.
2. Acting in concurrence; united in action.
         With what's unreal thou coactive art. --Shak.