- having a jaw of or like iron: an iron-jawed press; an iron-jawed fighter.
- fiercely determined: an iron-jawed will.
Origin of iron-jawed
First recorded in 1880–85
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for iron-jawed
An iron-jawed fellow he is, with every muscle in his well-knit body to match.A Tramp's Wallet
"Muddy gasoline," nodded Millbank tersely—an iron-jawed, over-groomed man of forty, with a florid face shaved blue.The Fighting Chance
Robert W. Chambers
Big Medicine was transformed into a cold-eyed, iron-jawed fighting machine.Flying U Ranch
B. M. Bower