Source : Webster's Revised Unabridged Dictionary (1913)

Port \Port\, n. [F. porte, L. porta, akin to portus; cf. AS.
   porte, fr. L. porta. See {Port} a harbor, and cf. {Porte}.]
   1. A passageway; an opening or entrance to an inclosed place;
      a gate; a door; a portal. [Archaic]

            Him I accuse The city ports by this hath entered.
                                                  --Shak.

            Form their ivory port the cherubim Forth issuing.
                                                  --Milton.

   2. (Naut.) An opening in the side of a vessel; an embrasure
      through which cannon may be discharged; a porthole; also,
      the shutters which close such an opening.

            Her ports being within sixteen inches of the water.
                                                  --Sir W.
                                                  Raleigh.

   3. (Mach.) A passageway in a machine, through which a fluid,
      as steam, water, etc., may pass, as from a valve to the
      interior of the cylinder of a steam engine; an opening in
      a valve seat, or valve face.

   {Air port}, {Bridle port}, etc. See under {Air}, {Bridle},
      etc.

   {Port bar} (Naut.), a bar to secure the ports of a ship in a
      gale.

   {Port lid} (Naut.), a lid or hanging for closing the
      portholes of a vessel.

   {Steam port}, & {Exhaust port} (Steam Engine), the ports of
      the cylinder communicating with the valve or valves, for
      the entrance or exit of the steam, respectively.

Bridle \Bri"dle\, n. [OE. bridel, AS. bridel; akin to OHG.
   britil, brittil, D. breidel, and possibly to E. braid. Cf.
   {Bridoon}.]
   1. The head gear with which a horse is governed and
      restrained, consisting of a headstall, a bit, and reins,
      with other appendages.

   2. A restraint; a curb; a check. --I. Watts.

   3. (Gun.) The piece in the interior of a gun lock, which
      holds in place the tumbler, sear, etc.

   4. (Naut.)
      (a) A span of rope, line, or chain made fast as both ends,
          so that another rope, line, or chain may be attached
          to its middle.
      (b) A mooring hawser.

   {Bowline bridle}. See under {Bowline}.

   {Branches of a bridle}. See under {Branch}.

   {Bridle cable} (Naut.), a cable which is bent to a bridle.
      See 4, above.

   {Bridle hand}, the hand which holds the bridle in riding; the
      left hand.

   {Bridle path}, {Bridle way}, a path or way for saddle horses
      and pack horses, as distinguished from a road for
      vehicles.

   {Bridle port} (Naut.), a porthole or opening in the bow
      through which hawsers, mooring or bridle cables, etc., are
      passed.

   {Bridle rein}, a rein attached to the bit.

   {Bridle road}.
      (a) Same as {Bridle path}. --Lowell.
      (b) A road in a pleasure park reserved for horseback
          exercise.

   {Bridle track}, a bridle path.

   {Scolding bridle}. See {Branks}, 2.

   Syn: A check; restrain.