From Longman Dictionary of Contemporary Englishkeep/lose track of somebody/somethingkeep/lose track of somebody/somethingKNOW somethingto pay attention to someone or something, so that you know where they are or what is happening to them, or to fail to do this It’s difficult to keep track of all the new discoveries in genetics. I just lost all track of time. → track
Examples from the Corpus
keep/lose track of somebody/something• Nobody could keep track of all the winners.• She'd lost track of it while she was dealing with Anna.• I followed the map, keeping track of our position so I could radio in our coordinates if we went down.• She keeps track of magazine subscription renewals on a 10-by-12-inch card.• Write down the names of people you meet, and then keep track of them.• Nitrogen use will be more problematic, but precision farming will enable farmers to keep track of field nutrient balances.• North wanted to have Waite wired to keep track of his movements electronically, but Waite, very sensibly, refused. 