noun, verb, tabbed, tab⋅bing.| 1. | a small flap, strap, loop, or similar appendage, as on a garment, used for pulling, hanging, or decoration. |
| 2. | a tag or label. |
| 3. | a small projection from a card, paper, or folder, used as an aid in filing. |
| 4. | Informal. a bill, as for a meal in a restaurant; check. |
| 5. | a small piece attached or intended to be attached, as to an automobile license plate. |
| 6. | a small flap or tongue of material used to seal or close the opening of a container. |
| 7. | Also called tabulator. a stop on a typewriter, actuated by a key, that moves the carriage, typing element, etc., a predetermined number of spaces, used for typing material in columns, for fixed indentations, etc. |
| 8. | a programmed command on a computer, actuated by a key, that moves the cursor or printhead a predetermined number of spaces, used for keying material in columns, for fixed indentations, etc. |
| 9. | Theater.
|
| 10. | Aeronautics. a small airfoil hinged to the rear portion of a control surface, as to an elevator, aileron, or rudder. Compare trim tab. |
| 11. | to furnish or ornament with a tab or tabs. |
| 12. | to name or designate. |
| 13. | Also, tabulate. to operate the tab function on a typewriter or computer. |
| 14. | keep tabs or tab on, Informal. to keep an account of; check on; observe: The police kept tabs on the suspect's activities. |
tab
|
keep tabs on
Observe carefully, keep a record of. For example, I hate having my boss keep tabs on my every move, or We've got to keep tabs on outgoing mail so we can keep track of postage. This expression uses to tab in the sense of "an account." [Late 1800s] Also see keep track.