Source : Webster's Revised Unabridged Dictionary (1913)

Impregnate \Im*preg"nate\ ([i^]m*pr[e^]g"n[=a]t), v. t. [imp. &
   p. p. {Impregnated} (-n[asl]*t[e^]d); p. pr. & vb. n.
   {Impregnating} (-n[asl]*t[i^]ng).] [LL. impraegnatus, p. p.
   of impraegnare to impregnate, fr. L. pref. im- in + praegnans
   pregnant. See {Pregnant}.]
   1. To make pregnant; to cause to conceive; to render
      prolific; to get with child or young.

   2. (Biol.) To come into contact with (an ovum or egg) so as
      to cause impregnation; to fertilize; to fecundate.

   3. To infuse an active principle into; to render fruitful or
      fertile in any way; to fertilize; to imbue.

   4. To infuse particles of another substance into; to
      communicate the quality of another to; to cause to be
      filled, imbued, mixed, or furnished (with something); as,
      to impregnate India rubber with sulphur; clothing
      impregnated with contagion; rock impregnated with ore.

Impregnate \Im*preg"nate\ ([i^]m*pr[e^]g"n[=a]t), v. i.
   To become pregnant. --Addison.

Impregnate \Im*preg"nate\ (-n[asl]t), a. [LL. impraegnatus, p.
   p.]
   Impregnated; made prolific.

         The scorching ray Here pierceth not, impregnate with
         disease.                                 --Byron.

Source : WordNet®

impregnate
     v 1: fill, as with a certain quality; "The heavy traffic
          tinctures the air with carbon monoxide" [syn: {infuse},
          {instill}, {tincture}]
     2: infuse or fill completely; "Impregnate the cloth with
        alcohol" [syn: {saturate}]
     3: fertilize and cause to grow; "the egg was impregnated"
     4: make pregnant; "He impregnated his wife again" [syn: {knock
        up}, {bang up}, {prang up}]