Source : Webster's Revised Unabridged Dictionary (1913)

Drop \Drop\, v. t. [imp. & p. p. {Dropped}or {Dropt}; p. pr. &
   vb. n. {Dropping}.] [OE. droppen, AS. dropan, v. i. See
   {Drop}, n.]
   1. To pour or let fall in drops; to pour in small globules;
      to distill. ``The trees drop balsam.'' --Creech.

            The recording angel, as he wrote it down, dropped a
            tear upon the word and blotted it out forever.
                                                  --Sterne.

   2. To cause to fall in one portion, or by one motion, like a
      drop; to let fall; as, to drop a line in fishing; to drop
      a courtesy.

   3. To let go; to dismiss; to set aside; to have done with; to
      discontinue; to forsake; to give up; to omit.

            They suddenly drop't the pursuit.     --S. Sharp.

            That astonishing ease with which fine ladies drop
            you and pick you up again.            --Thackeray.

            The connection had been dropped many years. -- Sir
                                                  W. Scott.

            Dropping the too rough H in Hell and Heaven.
                                                  --Tennyson.

   4. To bestow or communicate by a suggestion; to let fall in
      an indirect, cautious, or gentle manner; as, to drop hint,
      a word of counsel, etc.

   5. To lower, as a curtain, or the muzzle of a gun, etc.

   6. To send, as a letter; as, please drop me a line, a letter,
      word.

   7. To give birth to; as, to drop a lamb.

   8. To cover with drops; to variegate; to bedrop.

            Show to the sun their waved coats dropped with gold.
                                                  --Milton.

   {To drop a vessel} (Naut.), to leave it astern in a race or a
      chase; to outsail it.

Dropping \Drop"ping\, n.
   1. The action of causing to drop or of letting drop; falling.

   2. pl. That which falls in drops; the excrement or dung of
      animals.

   {Dropping bottle}, an instrument used to supply small
      quantities of a fluid to a test tube or other vessel.

   {Dropping fire}, a continued irregular discharge of firearms.
      

   {Dropping tube}, a tube for ejecting any liquid in drops.

Source : WordNet®

drop
     n 1: a small quantity (especially of a liquid); "one drop of each
          sample was analyzed"; "any child with a drop of negro
          blood was legally a negro"; "there is not a drop of pity
          in that man" [syn: {driblet}]
     2: a shape that is small and round; "he studied the shapes of
        low-viscosity drops"; "beads of sweat on his forehead"
        [syn: {bead}, {pearl}]
     3: a sudden sharp decrease in some quantity; "a drop of 57
        points on the Dow Jones index"; "there was a drop in
        pressure in the pulmonary artery"; "a dip in prices";
        "when that became known the price of their stock went into
        free fall" [syn: {dip}, {fall}, {free fall}]
     4: a steep high face of rock; "he stood on a high cliff
        overlooking the town"; "a steep drop" [syn: {cliff}, {drop-off}]
     5: a predetermined hiding place for the deposit and
        distribution of illicit goods (such as drugs or stolen
        property)
     6: a free and rapid descent by the force of gravity; "it was a
        miracle that he survived the drop from that height" [syn:
        {fall}]
     7: a curtain that can be lowered and raised onto a stage from
        the flies; often used as background scenery [syn: {drop
        curtain}, {drop cloth}]
     8: a central depository where things can be left or picked up
     9: the act of dropping something; "they expected the drop would
        be successful"
     [also: {dropping}, {dropped}]

dropping
     adj 1: falling rapidly; "dropping prices"; "dropping rate of
            production"
     2: coming down freely under the influence of gravity; "the
        eerie whistle of dropping bombs"; "falling rain" [syn: {falling}]

drop
     v 1: let fall to the ground; "Don't drop the dishes"
     2: to fall vertically; "the bombs are dropping on enemy
        targets"
     3: go down in value; "Stock prices dropped"
     4: fall or drop to a lower place or level; "He sank to his
        knees" [syn: {sink}, {drop down}]
     5: terminate an association with; "drop him from the Republican
        ticket"
     6: utter casually; "drop a hint"
     7: stop pursuing or acting; "drop a lawsuit"; "knock it off!"
        [syn: {knock off}]
     8: leave or unload, especially of passengers or cargo; [syn: {set
        down}, {put down}, {unload}, {discharge}]
     9: cause to fall by or as if by delivering a blow; "strike down
        a tree"; "Lightning struck down the hikers" [syn: {fell},
        {strike down}, {cut down}]
     10: lose (a game); "The Giants dropped 11 of their first 13"
     11: pay out; "spend money" [syn: {spend}, {expend}]
     12: lower the pitch of (musical notes) [syn: {flatten}] [ant: {sharpen}]
     13: hang freely; "the ornaments dangled from the tree"; "The
         light dropped from the ceiling" [syn: {dangle}, {swing}]
     14: stop associating with; "They dropped her after she had a
         child out of wedlock" [syn: {dismiss}, {send packing}, {send
         away}]
     15: let or cause to fall in drops; "dribble oil into the
         mixture" [syn: {dribble}, {drip}]
     16: get rid of; "he shed his image as a pushy boss"; "shed your
         clothes" [syn: {shed}, {cast}, {cast off}, {shake off}, {throw},
          {throw off}, {throw away}]
     17: leave undone or leave out; "How could I miss that typo?";
         "The workers on the conveyor belt miss one out of ten"
         [syn: {neglect}, {pretermit}, {omit}, {miss}, {leave out},
          {overlook}, {overleap}] [ant: {attend to}]
     18: change from one level to another; "She dropped into army
         jargon"
     19: grow worse; "Her condition deteriorated"; "Conditions in the
         slums degenerated"; "The discussion devolved into a
         shouting match" [syn: {devolve}, {deteriorate}, {degenerate}]
         [ant: {recuperate}]
     20: give birth; used for animals; "The cow dropped her calf this
         morning"
     [also: {dropping}, {dropped}]

dropping
     See {drop}