Meaning

Strictly fixed, definite and not open to alteration, evasion or flexible interpretation. Most common before rule, distinction, deadline or boundary. It frequently occurs in a negative construction to say that discretion remains possible. Regional use: English; now international English.

Origin

Hard and fast is traditionally explained through nautical language for a ship held firmly aground, with hard describing the ground and fast meaning fixed. Merriam-Webster dates the modern fixed or inflexible sense to 1822. A surviving specialist definition in Admiral W. H. Smyth's Sailor's Word-Book is from 1867, later than that figurative evidence. The maritime derivation is therefore plausible and conventional but not proved by a printed nautical citation earlier than the figurative idiom, so it should not be presented as certain.

Research Sources

  1. Hard-and-fast Merriam-Webster
  2. Hard and fast Phrase Finder

Variants

  • A hard-and-fast rule

Usage Examples

  • There is no hard-and-fast rule for dividing the grant between the two projects.
  • The thirty-day target is guidance rather than a hard-and-fast deadline.
  • Editors apply a few hard-and-fast principles but judge most cases individually.

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