Synonyms of hard-and-fastnext
: not to be modified or evaded : strict
a hard-and-fast rule

Examples of hard-and-fast in a Sentence

hard-and-fast rules that governed the corporate environment in those days included strictures regarding office dress that were rigidly enforced hard-and-fast beliefs that are the rock-solid foundation of their religion
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
There are no hard-and-fast rules on how to log a home run or whether a circus catch ought to be recorded as more than an out. Jacob Feldman, Sportico.com, 24 Apr. 2026 Dogs bred for alertness or reactivity may be more attuned to sound, though this isn’t a hard-and-fast rule. Jamie Cuccinelli, Martha Stewart, 7 Apr. 2026 There are no hard-and-fast rules for replacing a mattress. Sharon Brandwein, USA Today, 3 Apr. 2026 One hard-and-fast rule to live by in this case? Stacia Datskovska, Footwear News, 26 Jan. 2026 See All Example Sentences for hard-and-fast

Word History

First Known Use

1822, in the meaning defined above

Time Traveler
The first known use of hard-and-fast was in 1822

Browse Nearby Words

Cite this Entry

“Hard-and-fast.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hard-and-fast. Accessed 2 May. 2026.

Kids Definition

hard-and-fast

adjective
ˌhärd-ᵊn-ˈfast
: not to be changed : fixed
a hard-and-fast rule
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster