A roll of banknotes or other paper currency, carried in lieu of a wallet.

"Phil kept his bankroll in his front pocket, as it made too much of a lump to sit on."

The monetary assets of a person or organization.

"Microsoft is a corporation with an extremely large bankroll."

To fund a project; to underwrite something.

"Professor Stebbins didn't need to apply for government grants because his lab was bankrolled by a large pharmaceutical corporation."