[adjective ahy-ern-klad; noun ahy-ern-klad]
- covered or cased with iron plates, as a ship for naval warfare; armor-plated.
- very rigid or exacting; inflexible; unbreakable: an ironclad contract.
- a wooden warship of the middle or late 19th century having iron or steel armor plating.
Origin of ironclad
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for ironclad
The Dallas case is breaking some of our ironclad assumptions.The CDC Was Wrong About How to Stop Ebola
October 1, 2014
But its now obvious the ironclad security guarantees they claimed to provide are perfectly hollow.Ukraine Expects U.S. Military Help If War With Russia Starts
March 17, 2014
The other rule, which is just as ironclad, gave rise to their motto: “Blood In/Blood Out.”
The ironclad rule for entrée into the Brotherhood is simple: kill a black or a Hispanic prisoner.
What they need is a workable, ironclad, conflict-ending arrangement to allow them to live side-by-side in peace.The Lessons of the Nakba
Ziad J. Asali
May 11, 2012
First of all I'd have to tie Josephine Francis down with an ironclad contract.Greener Than You Think
You might go so far as t' give that bellerin' ironclad a toot.'Harbor Tales Down North
The ironclad seemed to rebound and tremble for a moment, and then passed on.The Lively Poll
The vessel described was the Miantonoma, an American ironclad turret-ship.Man on the Ocean
A monster Russian ironclad, it was said, lay somewhere “outside.”In the Track of the Troops
- covered or protected with ironan ironclad warship
- inflexible; rigidan ironclad rule
- not able to be assailed or contradictedan ironclad argument
- a large wooden 19th-century warship with armoured plating
Word Origin and History for ironclad
Online Etymology Dictionary, © 2010 Douglas Harper