tab in WordNet English dictionary

1. the bill in a restaurant
   "he asked the waiter for the check"
   check  chit  tab 
   
2. a dose of medicine in the form of a small pellet
   pill  lozenge  tablet  tab 
   
3. 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"; "the filing cards were organized by cards having indexed tabs"
   tab 
   
4. the key on a typewriter or a word processor that causes a tabulation
   tab key  tab 
   
5. sensationalist journalism
   yellow journalism  tabloid  tab