What does backout mean?
A backout is the act of withdrawing from a commitment, agreement, or arrangement after having agreed to it — whether a sponsor pulling out of an event, a bidder abandoning a deal, or a participant dropping out of plans at the last minute. The term derives from the common phrasal verb "to back out," which describes the same behavior from the actor's point of view, and it carries a generally negative connotation: backing out of obligations is widely seen as unreliable or even dishonorable, especially when done without adequate notice. In business and legal contexts, contracts sometimes anticipate this risk by including provisions covering withdrawal. The word also has a specialized technical meaning: in computing and IT operations, a backout refers to reversing a change — such as rolling back a faulty software deployment or undoing a database transaction — restoring systems to a prior working state. While less frequent in casual speech than its parent verb, the noun remains useful wherever withdrawals or reversals need to be named concisely.
An act of withdrawing from a commitment, agreement, or plan after having previously agreed to it.
"Her backout from the wedding party two weeks before the ceremony upset everyone involved."
Often used attributively or with modifiers such as "last-minute" to emphasize timing.
(Computing) A reversion of a system, software release, or transaction to a previous state, typically to recover from a failure.
"Following the data corruption incident, the engineers executed a complete backout of the morning's deployment."
This sense is largely confined to technical documentation and IT operational language.
Used when counting multiple instances of withdrawal, e.g. across deals or deployments.
"Late cancellations and backouts forced the venue to revise its booking policy."
Written as one word, 'backout' is mostly a noun born from the phrasal verb 'to back out' — English's habit of fusing verb particles into nouns at work.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of backout
Backout is formed transparently from the native English elements "back" (Old English bæc) and "out" (Old English ūt), following the productive pattern by which phrasal verbs like "break out" and "lock out" yield fused noun forms such as "breakout" and "lockout." The underlying phrasal verb "back out," meaning to withdraw from an undertaking, developed in English over the course of the nineteenth century. Its compounds and relatives include other back-derived formations such as "backup," "setback," and "feedback."
How backout is actually used
The one-word noun form is less common than the phrasal verb "back out"; in everyday speech people more often say someone "backed out" than that there was a "backout." The computing sense appears mainly in technical and IT contexts.
Easily confused with backout
"Back out" is the two-word phrasal verb describing the act of withdrawing, while "backout" is the noun form referring to the act itself.
A "blackout" is a loss of electricity, consciousness, or memory, whereas a "backout" is a withdrawal from an agreement.