The Collaborative International Dictionary of English v.0.48:

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.
   [1913 Webster]

   Expectant estate (Law), an estate in expectancy. See under
      Expectancy.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Expectant \Ex*pect"ant\, n.
   One who waits in expectation; one held in dependence by hope
   of receiving some good.
   [1913 Webster]

         An expectant of future glory.            --South.
   [1913 Webster]

         Those who had employments, or were expectants. --Swift.
   [1913 Webster]

WordNet (r) 3.0 (2006):

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