Source : Webster's Revised Unabridged Dictionary (1913)

Rag \Rag\, v. t.
   1. (Music) To play or compose (a piece, melody, etc.) in
      syncopated time. [Colloq.]

   2. To dance to ragtime music, esp. in some manner considered
      indecorous. [Colloq. or Slang]

Rag \Rag\, v. i. [imp. & p. p. {Ragged}; p. pr. & vb. n.
   {Ragging}.]
   To become tattered. [Obs.]

Rag \Rag\, v. t. [Cf. Icel. r[ae]gja to calumniate, OHG, ruogen
   to accuse, G. r["u]gen to censure, AS. wr[=e]gan, Goth.
   wr[=o]hjan to accuse.]
   To scold or rail at; to rate; to tease; to torment; to
   banter. [Prov. Eng.] --Pegge.

Rag \Rag\, n. [OE. ragge, probably of Scand, origin; cf. Icel.
   r["o]gg rough hair. Cf. {Rug}, n.]
   1. A piece of cloth torn off; a tattered piece of cloth; a
      shred; a tatter; a fragment.

            Cowls, hoods, and habits, with their wearers,
            tossed, And fluttered into rags.      --Milton.

            Not having otherwise any rag of legality to cover
            the shame of their cruelty.           --Fuller.

   2. pl. Hence, mean or tattered attire; worn-out dress.

            And virtue, though in rags, will keep me warm.
                                                  --Dryden.

   3. A shabby, beggarly fellow; a ragamuffin.

            The other zealous rag is the compositor. --B.
                                                  Jonson.

            Upon the proclamation, they all came in, both tag
            and rag.                              --Spenser.

   4. (Geol.) A coarse kind of rock, somewhat cellular in
      texture.

   5. (Metal Working) A ragged edge.

   6. A sail, or any piece of canvas. [Nautical Slang]

            Our ship was a clipper with every rag set. --Lowell.

   {Rag bolt}, an iron pin with barbs on its shank to retain it
      in place.

   {Rag carpet}, a carpet of which the weft consists of narrow
      of cloth sewed together, end to end.

   {Rag dust}, fine particles of ground-up rags, used in making
      papier-mach['e] and wall papers.

   {Rag wheel}.
      (a) A chain wheel; a sprocket wheel.
      (b) A polishing wheel made of disks of cloth clamped
          together on a mandrel.

   {Rag wool}, wool obtained by tearing woolen rags into fine
      bits, shoddy.

Rag \Rag\, v. t.
   1. To break (ore) into lumps for sorting.

   2. To cut or dress roughly, as a grindstone.

Source : WordNet®

rag
     n 1: a small piece of cloth or paper [syn: {shred}, {tag}, {tag
          end}, {tatter}]
     2: a week at British universities during which side-shows and
        processions of floats are organized to raise money for
        charities [syn: {rag week}]
     3: music with a syncopated melody (usually for the piano) [syn:
         {ragtime}]
     4: newspaper with half-size pages [syn: {tabloid}, {sheet}]
     5: a boisterous practical joke (especially by college students)
     [also: {ragging}, {ragged}]

rag
     v 1: treat cruelly; "The children tormented the stuttering
          teacher" [syn: {torment}, {bedevil}, {crucify}, {dun}, {frustrate}]
     2: cause annoyance in; disturb, especially by minor
        irritations; "Mosquitoes buzzing in my ear really bothers
        me"; "It irritates me that she never closes the door after
        she leaves" [syn: {annoy}, {get to}, {bother}, {get at}, {irritate},
         {rile}, {nark}, {nettle}, {gravel}, {vex}, {chafe}, {devil}]
     3: play in ragtime; "rag that old tune"
     4: harass with persistent criticism or carping; "The children
        teased the new teacher"; "Don't ride me so hard over my
        failure"; "His fellow workers razzed him when he wore a
        jacket and tie" [syn: {tease}, {razz}, {cod}, {tantalize},
         {tantalise}, {bait}, {taunt}, {twit}, {rally}, {ride}]
     5: censure severely or angrily; "The mother scolded the child
        for entering a stranger's car"; "The deputy ragged the
        Prime Minister"; "The customer dressed down the waiter for
        bringing cold soup" [syn: {call on the carpet}, {rebuke},
        {trounce}, {reproof}, {lecture}, {reprimand}, {jaw}, {dress
        down}, {call down}, {scold}, {chide}, {berate}, {bawl out},
         {remonstrate}, {chew out}, {chew up}, {have words}, {lambaste},
         {lambast}]
     6: break into lumps before sorting; "rag ore"
     [also: {ragging}, {ragged}]