Definitions
1.nounA small flap or strip of material attached to something, for holding, manipulation, identification, opening etc.
2.nounAn ear.
3.noun(by extension) A navigational widget, resembling a physical tab, for switching between documents or sets of controls.
4.nounThe page or form associated with such a navigational widget."How many tabs are open in your Web browser?"
5.noun(British army) A fast march or run with full kit.
6.verbTo affix with tabs; to label.
7.nounA restaurant bill.
8.nounCredit account, e.g., in a shop or bar; slate"Put this round on my tab, will you, barman."
9.nounA space character that extends to the next aligned column, traditionally used for tabulation.
10.verbTo use the Tab key on a computer to advance the cursor or move the input focus, or on a typewriter to advance the carriage.
11.nounA cigarette."Giv'is a tab man!"
12.nounA form of musical notation indicating fingering rather than the pitch of notes, commonly used for stringed instruments.
13.noun(British slang) A student of Cambridge University.
14.nounA tabloid newspaper.
15.nounA tablet, especially one containing illicit drugs.
16.nounA tableau curtain.