Definition of hard-and-fast
:not to be modified or evaded :strict
- a hard-and-fast rule
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First Known Use of hard-and-fast
1822
hard-and-fast Synonyms
Synonyms
certain, determinate, final, firm, flat, frozen, hard, hard-and-fast, inexpugnable, set, settled, stableAntonyms
alterable, changeable, elastic, flexible, mutable, variableRelated Words
nonadjustable, noncancelable, nonnegotiable, unchangeable; constant, steady, unchanging, uniform, unwavering; definite, exact, explicit, specific; given, stated, stipulated; dependable, good, reliable, responsible, safe, solid, sure, tried, tried-and-true, true, trustworthy, trustyNear Antonyms
adjustable, changeable, negotiable; indefinite, open-ended, unspecified; capricious, changeful, flickery, fluctuating, fluid, inconstant, mercurial, mutable, temperamental, uncertain, unpredictable, unsettled, unstable, unsteady, variable, volatileHARD-AND-FAST Defined for English Language Learners
hard-and-fast
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adjective
Definition of hard-and-fast for English Language Learners
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—used to say that something (such as a rule) cannot be changed
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