Definition of iron-headed in US English:

iron-headed

adjective

  • 1Of a tool, weapon, or other object: having an iron head; tipped with iron.

  • 2Designating King Charles XII of Sweden (1682–1718).

  • 3Hard-headed, determined, unwavering; stubborn, obstinate.

Origin

Late 16th century; earliest use found in Edmund Spenser (?1552–1599), poet and administrator in Ireland. From iron + headed.

Pronunciation

iron-headed

/ˌʌɪənˈhɛdɪd/