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)]

Moby Thesaurus II by Grady Ward, 1.0:

55 Moby Thesaurus words for "expectant":
   agape, agog, alert, all agog, anticipant, anticipating,
   anticipative, anticipatory, anxious, apprehensive, aspiring,
   assured, atiptoe, awaiting, big, certain, confident, eager,
   expecting, fond, forearmed, forestalling, forewarned, full of hope,
   gaping, gone, gravid, heavy, hopeful, hoping, in anticipation,
   in expectation, in good heart, in hopes, looking, looking for,
   looking forward to, not surprised, of good cheer, of good hope,
   open-eyed, openmouthed, optimistic, parturient, prepared, ready,
   sanguine, sure, undespairing, unsurprised, waiting, waiting for,
   watchful, watching for, with bated breath



Bouvier's Law Dictionary, Revised 6th Ed (1856):

EXPECTANT. Having relation to, or depending upon something; this word is
frequently used in connexion with fee, as fee expectant.