Meaning of the word ironclad in English

What does ironclad mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

ironclad

US /ˈaɪrn.klæd/
UK /ˈaɪən.klæd/

Adjective

1.

covered or protected with iron plates

Example:
The warship was an ironclad vessel, heavily armored for battle.
The museum displayed an old ironclad safe.
2.

impossible to contradict, weaken, or defeat; very strong and secure

Example:
The lawyer presented an ironclad case that left no room for doubt.
They signed an ironclad agreement.