<p><strong>Noun</strong></p><ul><li>A small flap, strap, loop, or similar appendage, as on a garment, used for pulling, hanging, or decoration.</li><li>A tag or label.</li><li>A small projection from a card, paper, or folder, used as an aid in filing.</li><li>Informal: a bill, as for a meal in a restaurant; check: That dinner went way over my budget, so I was relieved when she offered to pick up the tab.</li><li>A list of accruing costs, as drinks ordered in a bar: Go ahead and order another round of beers—we’ve got a running tab.</li><li>A small piece attached or intended to be attached, as to an automobile license plate.</li><li>A small flap or tongue of material used to seal or close the opening of a container.</li><li>Also called tabulator: a key on a typewriter that moves the carriage, typing element, etc., a predetermined number of spaces, used for typing text in columns, for fixed indentations, etc.</li><li>Also called tab key: a key on a computer keyboard that moves the cursor a predetermined number of spaces, used for keying text in columns or form fields, for fixed indentations, etc.</li><li>Digital Technology: (in a web browser window or in a spreadsheet or other application) a page displayed by clicking on or selecting a user interface element that resembles a paper tab: The third tab in the spreadsheet lists expenses.</li><li>The display of this user interface element: I have too many tabs open in my browser right now.</li><li>Theater: a small, often narrow, drop curtain, for masking part of the stage.</li><li>A small airfoil hinged to the rear portion of a control surface, as to an elevator, aileron, or rudder.</li></ul><p><strong>Verb</strong></p><ul><li>To furnish or ornament with a tab or tabs.</li><li>To name or designate.</li></ul><p><strong>Verb (used without object)</strong></p><ul><li>To operate the tab function on a typewriter or computer.</li></ul>