'Probationary' definitions:

Definition of 'probationary'

adjective

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

Definition of 'Probationary'

From: GCIDE

Probationary \Pro*ba"tion*a*ry\, a. Of or pertaining to probation; serving for trial. [1913 Webster]
To consider this life . . . as a probationary state. --Paley. [1913 Webster]

Synonyms of 'probationary'

From: Moby Thesaurus

cut-and-try,
empirical,
experimental,
heuristic,
hit-or-miss,
on probation,
pilot,
probational,
probative,
probatory,
proving,
provisional,
tentative,
test,
testing,
trial,
trial-and-error,
trying,
verificatory