definition of
tab

[1] #1 tab n. [check, chit] the bill in a restaurant; "he asked the waiter for the check". wn

[2] #2 tab n. [yellow journalism, tabloid] sensationalist journalism. wn

[3] #3 tab n. [tab key] the key on a typewriter or a word processor that causes a tabulation. wn

[4] #4 tab n. 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"; ". wn

[5] #5 tab n. [pill, lozenge, tablet] a dose of medicine in the form of a small pellet. wn