ironclad
Definition from Wiktionary, the free dictionary
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[edit] English
[edit] Etymology
[edit] Pronunciation
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[edit] Adjective
ironclad (not comparable)
- Covered with iron.
- (figuratively) Solid or certain; not able to be disputed or questioned; irrefutable.
- The guy had an ironclad alibi for his whereabouts on the night of the crime.