noun: Initialism of bank holiday. [(chiefly UK, Ireland) A weekday, often a Monday, on which most businesses are closed, and granted to workers as a national holiday.]
noun: (knitting) Initialism of buttonhole. [A hole through which a button is pushed to secure a garment or some part of one.]
noun: (astronomy) Initialism of black hole. [A place of punitive confinement; a lockup or cell; a military guardroom.]
