Source : Webster's Revised Unabridged Dictionary (1913)

Rib \Rib\, v. t. [imp. & p. p. {Ribbed}; p. pr. & vb. n.
   {Ribbing}.]
   1. To furnish with ribs; to form with rising lines and
      channels; as, to rib cloth.

   2. To inclose, as with ribs, and protect; to shut in.

Ribbed \Ribbed\, a.
   1. Furnished or formed with ribs; as, a ribbed cylinder;
      ribbed cloth.

   2. (Mining) Intercalated with slate; -- said of a seam of
      coal. --Raymond.

Source : WordNet®

ribbed
     adj 1: furnished or strengthened with ribs [ant: {ribless}]
     2: (of the surface of shells) having a rough, rib-like texture
        [syn: {costate}]

rib
     n 1: support resembling the rib of an animal
     2: any of the 12 pairs of curved arches of bone extending from
        the spine to or toward the sternum in humans (and similar
        bones in most vertebrates) [syn: {costa}]
     3: cut of meat including one or more ribs
     4: a teasing remark
     5: a riblike supporting or strengthening part of an animal or
        plant
     6: a projecting molding on the underside of a vault or ceiling;
        may be ornamental or structural
     [also: {ribbing}, {ribbed}]

rib
     v 1: form vertical ribs by knitting; "A ribbed sweater"
     2: subject to laughter or ridicule; "The satirists ridiculed
        the plans for a new opera house"; "The students poked fun
        at the inexperienced teacher"; "His former students
        roasted the professor at his 60th birthday" [syn: {ridicule},
         {roast}, {guy}, {blackguard}, {laugh at}, {jest at}, {make
        fun}, {poke fun}]
     [also: {ribbing}, {ribbed}]

ribbed
     See {rib}