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Dictionary Suite
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back-order to submit an order for (something) to be filled at a later time, as when (it) is available.
back out of to withdraw from prematurely. [2 definitions]
backpack a pack used to carry objects, esp. camping gear, on one's back; knapsack. [3 definitions]
back-pedal to press backward on the pedals of a bicycle or tricycle in order to brake. [3 definitions]
backrest something against which one can rest one's back.
back road (often pl.) a country road or local road that avoids traffic as well as high speed travel.
backscatter the deflection, by electromagnetic or nuclear forces, of moving waves or particles away from their original direction at angles greater than ninety degrees.
backscattering backscatter.
back seat a seat or seating area behind other seats, esp. of a vehicle.
back-seat driver a passenger who gives unsolicited advice about driving to the driver.
backside (informal) the fleshy portion of the body upon which one sits; buttocks. [2 definitions]
backslide to revert to moral wrongdoing or sin.
backspace to move a typewriter carriage or computer cursor back one or more spaces by pressing a certain key. [2 definitions]
backspin a reverse spin put on a ball, such as a billiard or tennis ball, that causes it to stop suddenly or move in a backward direction.
backstage to or in the areas of a theater stage that are not visible to the audience, esp. the wings and dressing rooms. [4 definitions]
backstairs secret or underhanded; clandestine.
backstay a rope that extends from the mast to the stern or side of a vessel to help support the mast.
back-step a step taken backwards. [2 definitions]
backstop in sports, a structure, such as a fence or wall, used to keep a ball from going out of the playing area. [2 definitions]
backstreet a minor road somewhat distant from major thoroughfares within a town or city. [2 definitions]
backstretch the straight portion of a racetrack following the first turn. (Cf. homestretch.)