Meaning of “turnover” - Learner’s Dictionary

turnover

noun uk us /ˈtɜːnˌəʊvər/
MONEY [ no plural ]

how much money a business earns in a period of time

WORKERS [ U, no plural ]

the rate at which workers leave an organization and new workers join it:

a high turnover of staff

(Definition of “turnover” from the Cambridge Learner’s Dictionary © Cambridge University Press)