English definition of “tab”
/tæb/ noun [C]
PAPER/METAL ETC › a small piece of paper, metal, etc that is fixed to something and that you use to open it or find out information about it: Pull tab to open.
AMOUNT OF MONEY › an amount of money that you owe for something you have bought or for a service you have used: Officials said the tab for the new bridge would be $8 million.
pick up the tab › to pay for something, especially a meal in a restaurant