cast-iron
1 of 2adjective
ˈkast-ˈī(-ə)rn 
1
: made of cast iron
2
: resembling cast iron: such as
a
: capable of withstanding great strain
a cast-iron stomach
b
: not admitting change, adaptation, or exception : rigid
a cast-iron will
c
British : not likely to fail or be broken : airtight
"Clever idea, Black, getting yourself seen on a safe station platform … gave you a cast-iron excuse not to leave your hidey-hole in future, didn't it?"
J. K. Rowling
J. K. Rowlingcast iron
2 of 2noun
: a commercial alloy of iron, carbon, and silicon that is cast in a mold and is hard, brittle, nonmalleable, and incapable of being hammer-welded but more easily fusible than steel
Synonyms
Adjective
- brassbound
- exacting
- hard-line
- inflexible
- rigid
- rigorous
- strict
- stringent
- uncompromising
See all Synonyms & Antonyms 
Example Sentences
Noun The fence is made of cast iron.
Recent Examples on the Web Molly Allen, Good Housekeeping, 3 Aug. 2022 There’s really no better way to cook over a campfire than with a cast iron pan. Heather Adams, Outside Online, 12 July 2022 It’s on sale during Black Friday and includes a 14-inch pizza peel and a cast iron sizzler pan for cooking up 16-inch pies, bread and more. Danielle Directo-meston, The Hollywood Reporter, 8 June 2022 Wolfgang Puck has been a household name for decades and this cast iron grill pan ($54.95) will make any home cook feel like a celebrity chef in their own kitchen. Aly Walansky, Forbes, 2 May 2022 Add a pizza stone to a rack below and additional heat-proof metal, like baking sheets or a cast iron pan, to the rack above. Minerva Orduño Rincón, The Arizona Republic, 24 Apr. 2022 Like the deepest active black of the cast iron pan. Timothy Donnelly, The New Republic, 17 Mar. 2022 The aroma of sizzling meat in melted butter wafts from a cast iron pan while Jaden Bales shows his favorite way to cook up the best steak cuts from a big game animal. Mead Gruver, Anchorage Daily News, 13 Mar. 2022 Heat oil in large cast iron pot to 350F. Use a thermometer to monitor the temperature and ensure the oil doesn't get too hot. Grateful, USA TODAY, 3 Aug. 2022 See More
Noun
Lopez prefers heating tortillas in a cast iron pan or on a griddle before transferring them to a warmer. Molly Allen, Good Housekeeping, 3 Aug. 2022 There’s really no better way to cook over a campfire than with a cast iron pan. Heather Adams, Outside Online, 12 July 2022 It’s on sale during Black Friday and includes a 14-inch pizza peel and a cast iron sizzler pan for cooking up 16-inch pies, bread and more. Danielle Directo-meston, The Hollywood Reporter, 8 June 2022 Wolfgang Puck has been a household name for decades and this cast iron grill pan ($54.95) will make any home cook feel like a celebrity chef in their own kitchen. Aly Walansky, Forbes, 2 May 2022 Add a pizza stone to a rack below and additional heat-proof metal, like baking sheets or a cast iron pan, to the rack above. Minerva Orduño Rincón, The Arizona Republic, 24 Apr. 2022 Like the deepest active black of the cast iron pan. Timothy Donnelly, The New Republic, 17 Mar. 2022 The aroma of sizzling meat in melted butter wafts from a cast iron pan while Jaden Bales shows his favorite way to cook up the best steak cuts from a big game animal. Mead Gruver, Anchorage Daily News, 13 Mar. 2022 Heat oil in large cast iron pot to 350F. Use a thermometer to monitor the temperature and ensure the oil doesn't get too hot. Grateful, USA TODAY, 3 Aug. 2022 See More Word History
First Known Use
Adjective
1692, in the meaning defined at sense 1
Noun
1664, in the meaning defined above
Kids Definition
cast iron
noun
: a hard and brittle alloy of iron, carbon, and silicon shaped by being poured into a mold while melted
cast-iron
adjective
1
as in strict
not allowing for any exceptions or loosening of standards lost weight only after a cast-iron adherence to his diet Synonyms & Similar Words
Relevance
- strict
- rigorous
- rigid
- steadfast
- stringent
- uncompromising
- exacting
- inflexible
- brassbound
- adamant
- undeviating
- conscientious
- hard-line
- unbending
- meticulous
- stubborn
- adamantine
- punctilious
- immovable
- painstaking
- firm
- scrupulous
- relentless
- exact
- unflinching
- ironbound
- hardened
- unyielding
- implacable
- stern
- tenacious
- dogged
- flinty
- determined
- fussy
- close
- unrelenting
- tough
- resolved
- single-minded
- severe
- demanding
- unsparing
- grim
- harsh
- austere
- hard
- unappeasable
- hard-hearted
Antonyms & Near Antonyms
- flexible
- loose
- pliant
- lax
- pliable
- compliant
- slack
- soft
- yielding
- relaxed
- acquiescent
- gentle
- mild
- indulgent
- easy
- tolerant
- lenient
- merciful
- slipshod
- easygoing
- sloppy
- kindly
- compromising
- slovenly
- negligent
- remiss
- unfussy
- relenting
- neglectful
- pampering
- spoiling
2
as in sturdy
able to withstand hardship, strain, or exposure he has a cast-iron faith in his innate ability to overcome any adversity that life might throw against him Synonyms & Similar Words
- sturdy
- hardy
- strong
- stout
- hardened
- rugged
- vigorous
- tough
- durable
- robust
- toughened
- permanent
- leathery
- hard-bitten
- staunch
- healthy
- hard
- flinty
- stalwart
- enduring
- inured
- muscular
- resilient
- stable
- unyielding
- everlasting
- brawny
- thriving
- lasting
- immortal
- tenacious
- fortified
- tempered
- strapping
- hale
- imperishable
- flourishing
- stanch
- virile
- sound
- staying
- fit
- seasoned
- prospering
- husky
- lusty
- annealed
- red-blooded
- able-bodied
Antonyms & Near Antonyms
- soft
- weak
- delicate
- tender
- worn
- diseased
- weakened
- fragile
- enfeebled
- unsound
- emasculated
- wasted
- infirm
- worn-out
- puny
- frail
- nonhardy
- exhausted
- temporary
- crippled
- incapacitated
- debilitated
- sensitive
- susceptible
- run-down
- vulnerable
- yielding
- resistless
- enervated
- transient
- sapped
- mortal
- perishable
- unresistant