backmarkerA racer who holds a poor rank or is lapped in a race. Such racers often run for a team that has less funding than most other teams and/or lack talent compared to most other drivers.
backmaskedDeliberately recorded backwards in a track that is meant to be played forwards.
backmaskingA recording technique in which a sound or message is deliberately recorded backwards in a track that is meant to be played forwards.
BackmedeA locality in the Richmond Valley council area, north eastern New South Wales, Australia.
backoffThe situation where an algorithm or process refrains from taking an action it would otherwise have taken.
backorderAn order that cannot be currently filled or shipped, but is requested nonetheless for when the item becomes available again.
backoutA reversal or undoing of tasks previously done (often in reverse order).
backoverAn accident in which a motor vehicle reverses over an unseen person.
backpackA knapsack, sometimes mounted on a light frame, but always supported by straps, worn on a person’s back for the purpose of carrying things, especially when hiking, or on a student's back when carrying books.
backpackableCapable of being carried in a backpack.
backpackerA traveler whose luggage consists of a backpack; especially, such a traveler who uses hostels, public transport, and other inexpensive services.
backpatchTo update (partially compiled code) with jump addresses that were previously left as placeholders because they had not yet been encountered in the source code.
backpieceA decorated comb that attaches a veil to the back of a bride's head.
backplaneA circuit board that connects several connectors in parallel to each other, so that each pin of each connector is linked to the same relative pin of all the other connectors, forming a computer bus.
backplateA plate protecting a fighting person's back.
backportTo retroactively supply to a previous version of a software product a fix or a new feature at the same time or after supplying it to the current version.
backreferenceAn item in a regular expression equivalent to the text matched by an earlier pattern in the expression.
backrestThe back piece of a chair, used to support the sitter's back.
backrideTo travel on the back seat of a motorcycle
backriderA pillion rider; a person who rides on the back of a motorcycle
backridingthe act of riding on the back of a motorcycle; pillioning
backrollThe state of having been reverted, restored.
backronymA word that is originally not an acronym but is turned into one by devising a full form for it, sometimes as a folk etymology, sometimes as a contrived acronym to name a new organization, proposal, or other entity.
backronymicRelating to, or having the form of, a backronym.
backronymyThe back-formation of a phrase to fit an acronym.
backroomEspecially, one that is only accessible to a privileged few and can be used as an inconspicuous meeting place, where secrecy, anonymity, and even crooked dealings may occur.
backroomsA fictional environment, originating from an online urban legend and creepypasta, consisting of a seemingly endless maze of empty hallways, often described as being inhabited by monsters, or having multiple levels or floors.
backscratcherA long slender rod with a rake-like device on one end, sometimes in the form of a human hand, designed to let a person scratch their own back.
backscratchingThe act or habit of engaging in a reciprocal beneficial action.
backscreenA screen that is placed behind something (such as a projector)
backshellPart of an electrical conductor or other electrical device, such as a cable clamp or adapter, that is threaded onto the rear connector accessory threads of plug or receptacle connectors to make up the total connector assembly.
backshiftThe changing of the tense of a verb from present to past in reported speech.
backshotHaving the water introduced just behind the summit, combining the advantages of breastshot and overshot systems, since the full amount of the potential energy released by the falling water is harnessed as the water descends the back of the wheel.
backshuntA section of railway track which gives access to a siding (or another section of railway line) only by reversing direction; also a train movement which uses such track.
backsideThe back side of anything, the part opposite its front, particularly
backsiphonageThe reverse flow of water or other liquids into the water supply due to a drop in pressure in the system.
backskinA leather covering worn by miners in wet conditions
backslabA type of cast that is non-circumferential, only covering the posterior aspect of a limb, in order to permit swelling.
backslangA form of slang composed of words whose spelling or sound is reversed.
backslapTo enthusiastically affirm or congratulate a person, especially by patting them on the back.
backslapperOne who makes a show of liking another person with profuse or excessive displays of camaraderie, such as vigorous hand clasping, back-slapping, hearty words of greeting, etc.
backslashThe punctuation mark \ (a left-leaning diagonal line). (Common uses include (1) use as a delimiter in filepaths and (2) use as an escape character to mark literals.)
backslideTo regress; to slip backwards or revert to a previous, worse state.
backsliderA recidivist; one who backslides, especially in a religious sense; an apostate.
backspliceTo secure the ends of a twisted rope within the rope itself in order to prevent fraying
backsplitA split-level home whose split level is visible only from the side elevation.
backspreadA combination of options, with more being long than short
backstabTo attack someone (especially verbally) unfairly in a deceitful, underhand, or treacherous manner, especially when they're not present in the place or situation that it happens.