Source : Webster's Revised Unabridged Dictionary (1913)

Probationary \Pro*ba"tion*a*ry\, a.
   Of or pertaining to probation; serving for trial.

         To consider this life . . . as a probationary state.
                                                  --Paley.

Source : WordNet®

probationary
     adj : under terms not final or fully worked out or agreed upon;
           "probationary employees"; "a provisional government";
           "just a tentative schedule" [syn: {provisional}, {provisionary},
            {tentative}]