shadowshad·ow /ˈʃædəʊ-doʊ/ verb [transitiveT]1to watch someone very closely or work with them in order to learn how they do their jobThe managers were shadowed by trainees in the bank’s development programme.
2to change at the same rate or in the same way as somethingIn London, share prices shadowed Wall Street’s, to close midway.
Gloomy news in the technology sector was shadowed by smaller electronics stocks.