(chiefly Internet slang) An intimidatingly large block of writing, particularly one with few or no paragraph breaks.

(idiomatic) To make an all-out effort. / (idiomatic) To fail, to run out of options. (especially of a business) / To be put aside or forgotten. / To take an extreme and determined position or measure.

plural of retaining wall

(climbing) An artificial wall used for the sport of climbing

(marketing) In retail selling, a large, visually appealing display of products intended to attract the interest of customers.

(squash, racquetball) Either of the two parallel walls in a court, perpendicular to the front wall; either of the walls on the side of the court.

(of a wall clock) Having an exposed pendulum.

(squash, racquetball) The main and largest wall in court, located at the front of the world; the wall which the ball must hit in a rally. / Used other than figuratively or idiomatically: see front, wall.

Alternative spelling of fourth wall

plural of hole-in-the-wall