Source : Webster's Revised Unabridged Dictionary (1913)

Stoop \Stoop\, n.
   1. The act of stooping, or bending the body forward;
      inclination forward; also, an habitual bend of the back
      and shoulders.

   2. Descent, as from dignity or superiority; condescension; an
      act or position of humiliation.

            Can any loyal subject see With patience such a stoop
            from sovereignty?                     --Dryden.

   3. The fall of a bird on its prey; a swoop. --L'Estrange.

Stoop \Stoop\, v. i. [imp. & p. p. {Stooped}; p. pr. & vb. n.
   {Stooping}.] [OE. stoupen; akin to AS. st?pian, OD. stuypen,
   Icel. st[=u]pa, Sw. stupa to fall, to tilt. Cf 5th {Steep}.]
   1. To bend the upper part of the body downward and forward;
      to bend or lean forward; to incline forward in standing or
      walking; to assume habitually a bent position.

   2. To yield; to submit; to bend, as by compulsion; to assume
      a position of humility or subjection.

            Mighty in her ships stood Carthage long, . . . Yet
            stooped to Rome, less wealthy, but more strong.
                                                  --Dryden.

            These are arts, my prince, In which your Zama does
            not stoop to Rome.                    --Addison.

   3. To descend from rank or dignity; to condescend. ``She
      stoops to conquer.'' --Goldsmith.

            Where men of great wealth stoop to husbandry, it
            multiplieth riches exceedingly.       --Bacon.

   4. To come down as a hawk does on its prey; to pounce; to
      souse; to swoop.

            The bird of Jove, stooped from his a["e]ry tour, Two
            birds of gayest plume before him drove. --Milton.

   5. To sink when on the wing; to alight.

            And stoop with closing pinions from above. --Dryden.

            Cowering low With blandishment, each bird stooped on
            his wing.                             --Milton.

   Syn: To lean; yield; submit; condescend; descend; cower;
        shrink.

Stoop \Stoop\, n. [D. stoep.] (Arch.)
   Originally, a covered porch with seats, at a house door; the
   Dutch stoep as introduced by the Dutch into New York.
   Afterward, an out-of-door flight of stairs of from seven to
   fourteen steps, with platform and parapets, leading to an
   entrance door some distance above the street; the French
   perron. Hence, any porch, platform, entrance stairway, or
   small veranda, at a house door. [U. S.]

Stoop \Stoop\, n. [OE. stope, Icel. staup; akin to AS. ste['a]p,
   D. stoop, G. stauf, OHG. stouph.]
   A vessel of liquor; a flagon. [Written also {stoup}.]

         Fetch me a stoop of liquor.              --Shak.

Stoop \Stoop\, n. [Cf. Icel. staup a knobby lump.]
   A post fixed in the earth. [Prov. Eng.]

Stoop \Stoop\, v. t.
   1. To bend forward and downward; to bow down; as, to stoop
      the body. ``Have stooped my neck.'' --Shak.

   2. To cause to incline downward; to slant; as, to stoop a
      cask of liquor.

   3. To cause to submit; to prostrate. [Obs.]

            Many of those whose states so tempt thine ears Are
            stooped by death; and many left alive. --Chapman.

   4. To degrade. [Obs.] --Shak.

Source : WordNet®

stoop
     n 1: an inclination of the top half of the body forward and
          downward
     2: basin for holy water [syn: {stoup}]
     3: small porch or set of steps at the front entrance of a house
        [syn: {stoep}]

stoop
     v 1: bend one's back forward from the waist on down; "he crouched
          down"; "She bowed before the Queen"; "The young man
          stooped to pick up the girl's purse" [syn: {crouch}, {bend},
           {bow}]
     2: debase oneself morally, act in an undignified, unworthy, or
        dishonorable way; "I won't stoop to reading other people's
        mail" [syn: {condescend}, {lower oneself}]
     3: descend swiftly, as if on prey; "The eagle stooped on the
        mice in the field"
     4: sag, bend, bend over or down; "the rocks stooped down over
        the hiking path"
     5: carry oneself, often habitually, with head, shoulders, and
        upper back bent forward; "The old man was stooping but he
        could walk around without a cane"