(baseball, softball) A defensive play in which two outs are recorded. / (US, colloquial) Achieving two results from one action.

A situation where two things are changed at once / (baseball) A replacement of two players simultaneously, typically so that a fielder can hit in the pitcher's spot in the batting order.

(transitive) To double the quantity, amount or duration of something / (poker, by extension, intransitive) To double one's amount of chips by winning an all-in pot.

(physics) the antiparticle of a down quark

(computing) A dynamic menu; a list of options in a computer application which appears below a heading when it is selected, and remains only as long as the user needs it.

That can be pulled down (lowered).

(literally) The door at the main entrance to a building or house, normally fronts onto a street. / (by extension) The entire main entrance to a building or house.

(transitive) To make (something) lower (especially of clothes). / (transitive) To demolish or destroy (a building etc.). / (transitive) To cause to fall to the floor

(obsolete) A summary; a brief digest. / (law) A short entry of the proceedings of a court; the register containing them; the office containing the register.

(transitive) To enter or inscribe in a docket, or list of causes for trial. / (transitive) To label a parcel, etc.