(noun, adjective)


1. sheathed in iron plates for protection

Similar word(s): sheathed

2. inflexibly entrenched and unchangeable

- an ironclad rule

Similar word(s): inflexible, brassbound

Sentences with ironclad as an adjective:

- 1903, The Land Ironclads[1], Digitized edition, Science Fiction, Project Gutenberg, published 2006:In that flickering pallor it had the effect of a large and clumsy black insect, an insect the size of an ironclad cruiser, crawling obliquely to the first line of trenches and firing shots out of portholes in its side.

- The suspect had an ironclad alibi for his whereabouts on the night of the crime.

- an ironclad oath or pledge


1. a wooden warship of the 19th century that is plated with iron or steel armor

Definition categories: man–made, warship

Sentences with ironclad as a noun:

- 1903, The Land Ironclads[2], Digitized edition, Science Fiction, Project Gutenberg, published 2006:He turned again to the nearest land ironclad, advancing now obliquely to him and not three hundred yards away, and then scrambled the ground over which he must retreat if he was not to be captured.