Source : Webster's Revised Unabridged Dictionary (1913)

Tab \Tab\, n. [Etymol. uncertain.]
   1. The flap or latchet of a shoe fastened with a string or a
      buckle.

   2. A tag. See {Tag}, 2.

   3. A loop for pulling or lifting something.

   4. A border of lace or other material, worn on the inner
      front edge of ladies' bonnets.

   5. A loose pendent part of a lady's garment; esp., one of a
      series of pendent squares forming an edge or border.

Source : WordNet®

tab
     n 1: the bill in a restaurant; "he asked the waiter for the
          check" [syn: {check}, {chit}]
     2: sensationalist journalism [syn: {yellow journalism}, {tabloid}]
     3: the key on an electric typewriter that causes a tabulation
        [syn: {tab key}]
     4: a short strip of material attached to or projecting from
        something in order to facilitate opening or identifying or
        handling it; "pull the tab to open the can"; "files with a
        red tab will be stored separately"; "the collar has a tab
        with a button hole"
     5: a dose of medicine in the form of a small pellet [syn: {pill},
         {lozenge}, {tablet}]
     [also: {tabbing}, {tabbed}]

Source : Free On-Line Dictionary of Computing

TAB
     
        {HT}