Entertainment / Football / Fourth Down: The final of a set of four downs. Unless a first down is achieved or a penalty forces a replay of the down, the team will lose control of the ball after this play. If a team does not think they can get a first down, they often punt on fourth down or kick a field goal if they are close enough to do so.
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Technology / Rockets / Hold Down: A mechanical clamp for securing a motor to a test stand or to secure an entire vehicle to a launch pad and may be remotely released. MORE
Business / Finance / Hunkering Down: Used to describe the position of an investor whose stocks or bonds have dropped in value below their original purchase price. MORE
Entertainment / Literature / Fourth Wall: Sometimes referred to as the 'third wall,' depending upon how a stagebuilder numbers the sides of the stage, the fourth wall is an imaginary wall that separates the events on stage from the audience. MORE