noun

• (countable) An institution where one can place and borrow money and take care of financial affairs.
  "Finance is seldom romantic. But the idea of peer-to-peer lending comes close. This is an industry that brings together individual savers and lenders on online platforms.[…]Banks and credit-card firms are kept out of the picture. Talk to enough people in the field and someone is bound to mention the “democratisation of finance”."
• (countable) A branch office of such an institution.
• (countable) An underwriter or controller of a card game.
• (countable) A fund from deposits or contributions, to be used in transacting business; a joint stock or capital.
  "Let it be no bank or common stock, but every man be master of his own money."

verb

• (intransitive) To deal with a bank or financial institution, or for an institution to provide financial services to a client.
  "He banked with Barclays."
• (transitive) To put into a bank.
  "I’m going to bank the money."
• (transitive, slang) To conceal in the rectum for use in prison.
  "Johnny banked some coke for me."
• (transitive, finance) To provide banking services to.
  "They proposed an ambitious plan to bank people in remote rural communities."

noun

• (hydrology) An edge of river, lake, or other watercourse.
  "Tiber trembled underneath her banks."
• (nautical, hydrology) An elevation under the sea; a shallow area of shifting sand, gravel, mud, and so forth
  "the banks of Newfoundland"
• (geography) A slope of earth, sand, etc.; an embankment.
• (aviation) The incline of an aircraft, especially during a turn.

verb

• (intransitive, aviation) To roll or incline laterally in order to turn.
• (transitive) To cause (an aircraft) to bank.
• (transitive) To form into a bank or heap, to bank up.
  "to bank sand"
• (intransitive, of clouds) To form a bank; to gather in masses.
  "[…] clouds banking above the gravel road, their flat slate-blue bottoms threatening freezing rain or an early snowfall."