Source : Webster's Revised Unabridged Dictionary (1913)

Expectant \Ex*pect"ant\, a. [L. expectans, exspectans, p. pr. of
   expectare, exspectare: cf. F. expectant.]
   Waiting in expectation; looking for; (Med.) waiting for the
   efforts of nature, with little active treatment.

   {Expectant estate} (Law), an estate in expectancy. See under
      {Expectancy}.

Expectant \Ex*pect"ant\, n.
   One who waits in expectation; one held in dependence by hope
   of receiving some good.

         An expectant of future glory.            --South.

         Those who had employments, or were expectants. --Swift.

Source : WordNet®

expectant
     adj 1: marked by eager anticipation; "an expectant hush" [syn: {anticipant},
             {anticipative}]
     2: in an advanced stage of pregnancy; "was big with child";
        "was great with child" [syn: {big(p)}, {enceinte}, {gravid},
         {great(p)}, {large(p)}, {heavy(p)}, {with child(p)}]