fallback

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WORDNET DICTIONARY

Noun fallback has 1 sense

fallback(n = noun.act) disengagement, pullout - to break off a military action with an enemy; Array

is a kind of retreat

Derived form verb fall back₃

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CIDE DICTIONARY

fallback, n.

The act or process of falling back. [PJC]
Something or someone to which one resorts as an alternative to a failed resource or method. [PJC]

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THESAURUS

fallback

avoidance, cringe, disengagement, dodge, duck, evasion, flinch, pullback, pullout, recoil, reculade, retirement, retreat, shy, sidestep, sidestepping, wince, withdrawal, withdrawment