Definition of Ironside in US English:

Ironside

noun

  • 1(An epithet of) Edmund II, king of England (reigned 1016).

  • 2Generally (A name for) a person of great physical or mental strength. Also in plural in same sense. Now rare.

  • 3(An epithet of) Oliver Cromwell. Also preceded by old.

  • 4A member of Oliver Cromwell's cavalry; a Puritan soldier. Also in extended use. Now historical.

  • 5Chiefly with lower-case initial. A warship plated with iron; = "ironclad". Now historical.

Origin

Old English; earliest use found in The Anglo-Saxon Chronicle. From iron + side.

Pronunciation

Ironside

/ˈʌɪənsʌɪd/