Source : Webster's Revised Unabridged Dictionary (1913)

Immerse \Im*merse"\, a. [L. immersus, p. p. of immergere. See
   {Immerge}.]
   Immersed; buried; hid; sunk. [Obs.] ``Things immerse in
   matter.'' --Bacon.

Immerse \Im*merse"\, v. t. [imp. & p. p. {Immersed}; p. pr. &
   vb. n. {Immersing}.]
   1. To plunge into anything that surrounds or covers,
      especially into a fluid; to dip; to sink; to bury; to
      immerge.

            Deep immersed beneath its whirling wave. --J Warton.

            More than a mile immersed within the wood. --Dryden.

   2. To baptize by immersion.

   3. To engage deeply; to engross the attention of; to involve;
      to overhelm.

            The queen immersed in such a trance.  --Tennyson.

            It is impossible to have a lively hope in another
            life, and yet be deeply immersed inn the enjoyments
            of this.                              --Atterbury.

Source : WordNet®

immerse
     v 1: thrust or throw into; "Immerse yourself in hot water" [syn:
          {plunge}]
     2: engross (oneself) fully; "He immersed himself into his
        studies" [syn: {steep}, {engulf}, {plunge}, {engross}, {absorb},
         {soak up}]
     3: enclose or envelop completely, as if by swallowing; "The
        huge waves swallowed the small boat and it sank shortly
        thereafter" [syn: {swallow}, {swallow up}, {bury}, {eat up}]
     4: cause to be immersed; "The professor plunged his students
        into the study of the Italian text" [syn: {plunge}]