(colloquial) A tabloid newspaper.

(informal) A tablet, especially one containing illicit drugs.

(informal, theater) A tableau curtain.

present participle of tab

Having a tab (protruding strip of material). / (computing, graphical user interface) Having tabs (the user interface element).

simple past tense and past participle of tab

(computing) A key on a computer keyboard that typically inserts a tab or moves the input focus.

Alternative letter-case form of tab (“student at Cambridge”)

(idiomatic) To monitor; to keep track of; to watch.

plural of cross-tab