› [T] to follow the movement or progress of something or someone: The company set up a database to help track sales across the country. Investigators are tracking streams of the contaminated food through several states. › [T] to record the progress or development of something over a period: We have been tracking the trends in computer sales for over ten years. The study tracked the careers of 1226 doctors who trained at the University of Michigan Medical School. › [T] BANKING, FINANCE to follow the level of an interest rate: The mortgage deal will track the Bank of England base rate plus 0.75 pc. › [T] FINANCE, STOCK MARKET to follow the level of a particular share index: Tony is putting £500 a month into a savings account which tracks the FTSE All-Share index.