What does "ironclad" mean?
Ironclad: Rigorous; severe; exacting; as, an ironclad oath or pledge. [Colloq.]
Additional senses
- 2.A naval vessel having the parts above water covered and protected by iron or steel usually in large plates closely joined and made sufficiently thick and strong to resist heavy shot.
Sources
- Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).
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- Published: 2026-07-17T00:00:00-07:00 · Modified: 2026-07-17T00:00:00-07:00