keep a tab on (someone or something)

keep a tab on (someone or something)

To routinely monitor or observe someone or something; to keep track of someone or something. It was revealed that the FBI had kept a tab on him for years due to his political activities in college. Please keep a tab on the amount of feedback we get so that we know how many people this issue affects.
See also: keep, on, tab
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

keep tab(s) (on someone or something)

 and keep track (of someone or something)
Fig. to monitor someone or something; to follow the activities of someone or something. I'm supposed to keep track of my books. Try to keep tabs on everyone who works for you. It's hard to keep tabs when you have a lot of other work to do. I can't keep track of the money I earn. Maybe someone else is spending it.
See also: keep, tab
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
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