keep tabs on; keep an eye on; keep under surveillance

Plural form of tab, verb_ Third-person singular simple present indicative form of tab

A key on a computer keyboard that, when pressed, inserts a special ASCII character used for formatting text, as in indenting a line or block of text, A projection, flap, or short strip attached to an object to facilitate opening, handling, or identification, a bill or check for some purchase, as in a restaurant, verb_ Short for tabulate, computing To use the Tab key on a computer or typewriter to navigate the screen or page, Mark with a tab, transitive verb_ To supply with a tab or tabs

One who admonishes; one who warns of faults, informs of duty, or gives advice and instruction by way of reproof or caution, An ironclad war vessel, very low in the water, and having one or more heavily-armored revolving turrets, carrying heavy guns, Someone who watches over something; a person in charge of something or someone, verb_ keep tabs on; keep an eye on; keep under surveillance, intransitive verb_ To test or sample, especially on a regular or ongoing basis, To direct, To act as a monitor