Source : Webster's Revised Unabridged Dictionary (1913)

Pore \Pore\, n. [F., fr. L. porus, Gr. ? a passage, a pore. See
   {Fare}, v.]
   1. One of the minute orifices in an animal or vegetable
      membrane, for transpiration, absorption, etc.

   2. A minute opening or passageway; an interstice between the
      constituent particles or molecules of a body; as, the
      pores of stones.

Pore \Pore\, v. i. [imp. & p. p. {Pored}; p. pr. & vb. n.
   {Poring}.] [OE. poren, of uncertain origin; cf. D. porren to
   poke, thrust, Gael. purr.]
   To look or gaze steadily in reading or studying; to fix the
   attention; to be absorbed; -- often with on or upon, and now
   usually with over.``Painfully to pore upon a book.'' --Shak.

         The eye grows weary with poring perpetually on the same
         thing.                                   --Dryden.

Source : WordNet®

pore
     n 1: any tiny hole admitting passage of a liquid (fluid or gas)
     2: any small opening in the skin or outer surface of an animal
     3: a minute epidermal pore in a leaf or stem through which
        gases and water vapor can pass [syn: {stoma}, {stomate}]
     v : direct one's attention on something; "Please focus on your
         studies and not on your hobbies" [syn: {concentrate}, {focus},
          {center}, {centre}, {rivet}]