tab

Short definition from Wiktionary

Noun

1. 1
   A small flap or strip of material attached to or inserted into something, for holding, manipulation, identification, opening etc.
2. 2
   An ear.
3. 3
   A navigational widget, resembling a physical tab, for switching between documents or sets of controls.
4. 4
   The page or form associated with such a navigational widget.
5. 5
   A fast march or run with full kit.
6. 6
   A restaurant bill.
7. 7
   Credit account, e.g., in a shop or bar; slate.
8. 8
   The cost or bill for anything.
9. 9
   A space character that extends to the next aligned column, traditionally used for tabulation.
10. 10
    A cigarette.
11. 11
    A form of musical notation indicating fingering rather than the pitch of notes, commonly used for stringed instruments.
12. 12
    A student of Cambridge University.
13. 13
    A tabloid newspaper.
14. 14
    A tablet, especially one containing illicit drugs.
15. 15
    A tableau curtain.
16. 16
    A key on a computer keyboard that typically inserts a tab or moves the input focus.
17. 17
    Alternative letter-case form of tab (“student at Cambridge”).

Verb

1. 1
   To affix with tabs; to label.
2. 2
   To use the Tab key on a computer to advance the cursor or move the input focus, or on a typewriter to advance the carriage.