1
as in certain
having been established and usually not subject to change
hard-and-fast rules that governed the corporate environment in those days included strictures regarding office dress that were rigidly enforced
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2
as in unchangeable
not capable of changing or being changed
hard-and-fast beliefs that are the rock-solid foundation of their religion
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Recent Examples of hard-and-fast
Depositphotos So there's some hard-and-fast evidence that men have weaker immune systems than women, therefore get sicker than women, and therefore, likely complain more than women about their illnesses.
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Michael Franco, New Atlas, 21 Oct. 2024
Following the rhyme isn’t a hard-and-fast rule, but more of a starting point to fill out your board.
—Rachel Bernhard, Journal Sentinel, 26 Sep. 2024
Though there aren’t any hard-and-fast rules for planning a road trip — that’s the beauty of this type of travel — there are a few best practices to keep in mind when heading to the mountains of North Carolina.
—Lydia Mansel, Travel + Leisure, 24 Sep. 2024
Call it a supermoon a day or two before and after those phases, and that’s about right; Nolle’s supermoon is meant as a rough concept more than a hard-and-fast definition.
—Phil Plait, Scientific American, 13 Sep. 2024
See all Example Sentences for hard-and-fast 
Michael Franco, New Atlas, 21 Oct. 2024
Following the rhyme isn’t a hard-and-fast rule, but more of a starting point to fill out your board.
—Rachel Bernhard, Journal Sentinel, 26 Sep. 2024
Though there aren’t any hard-and-fast rules for planning a road trip — that’s the beauty of this type of travel — there are a few best practices to keep in mind when heading to the mountains of North Carolina.
—Lydia Mansel, Travel + Leisure, 24 Sep. 2024
Call it a supermoon a day or two before and after those phases, and that’s about right; Nolle’s supermoon is meant as a rough concept more than a hard-and-fast definition.
—Phil Plait, Scientific American, 13 Sep. 2024
See all Example Sentences for hard-and-fast
Recent Examples of Synonyms for hard-and-fast
Adjective
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Vitamin D supplements can also have problematic interactions with certain common prescription medications, including statins.Jamie Ducharme, TIME, 17 Dec. 2024
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These objections aside, the simple fact is that no one can say for certain what Trump’s mass deportation plan will look like because no specifics have been revealed, with the administration instead filling the void with dangerous rhetoric.David Gilbert, WIRED, 17 Dec. 2024
Adjective
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Myth #3: Social determinants of health are static and unchangeable.Sean Fogarty, Forbes, 9 Dec. 2024
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Moreover, blockchain enhances security by providing a secure, unchangeable record of energy transactions.Ariel Cohen, Forbes, 6 Dec. 2024
Adjective
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Generally speaking, hormonal imbalances don’t lead to stable emotions.Jeanne Ballion, Vogue, 13 Dec. 2024
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Emotional readiness might include feeling stable, curious about new opportunities or prepared for structured routines.Diane Winiarski, Forbes, 13 Dec. 2024
Adjective
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Our planetary neighbor’s atmosphere is unchanging, meaning the substances lost are constantly replenished by volcanic activity.Margherita Bassi, Smithsonian Magazine, 5 Dec. 2024
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There is no conflict here between reaching out to readers who get their news from print, or podcasts, or video clips posted to social media because our message is unchanging.Noah Rothman, National Review, 20 Nov. 2024
Adjective
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The decision in the final weeks of President Joe Biden's administration sets up a fight over the future of California's vehicle regulations.David Shepardson, USA TODAY, 19 Dec. 2024
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Monetary policy Policymakers at the European Central Bank announced their fourth and final rate cut of the year last Thursday.Chloe Taylor, CNBC, 18 Dec. 2024
Adjective
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According to witnesses, a cluster of what appeared to be drones, as well as a possible fixed wing aircraft, was flying in the area, the FBI said.Saleen Martin, USA TODAY, 4 Dec. 2024
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The regulations that came into effect at the end of June placed a limit on stablecoin volumes permitted over a fixed period.Sean Lee, Forbes, 3 Dec. 2024
Adjective
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Sandoval has received some pay bumps, including a temporary $10,000-a-year bonus for Hawaii special education teachers designed to alleviate shortages in that and other hard-to-staff areas.Alia Wong, USA TODAY, 14 Feb. 2023
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Whether those numbers are an overstatement, or possibly an understatement, is hard to say.Lance Eliot, Forbes, 13 Feb. 2023
Thesaurus Entries Near hard-and-fast
Cite this Entry
“Hard-and-fast.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/hard-and-fast. Accessed 21 Dec. 2024.
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