black iron

noun

Free weights as opposed to exercise machines.

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Meanings

nounblack iron (uncountable)
  1. uncountablegym jargonFree weights as opposed to exercise machines.

    There^([sic]) always lifting big, black iron and such, grunting, screaming out shit and slamming down the barbells […]

    2021, Jane Brooke, Vegas Savages
    1 more example

    The problem we had was not the concept or the product, but what to do with the space. To put a beauty salon alongside a black iron gym was ludicrous.

    2017, Ken Heathcote, We're Going To Live Forever: The Secrets To Eternal Youth, page 44

Synonyms & antonyms

Also see
free weightweight

Origin

From the typical paint color and material traditionally used for free weights (cast iron with black paint).

Full word history & related roots →
Cite this entry
APA

black iron. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/black%20iron

MLA

“black iron.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/black%20iron. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “black iron,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/black%20iron.

Source: black iron on Wiktionary, CC BY-SA 4.0.