Wordnet 3.0
NOUN (1)
1.
a man of great strength or bravery;
The Collaborative International Dictionary of English v.0.48:
ironside \i"ron*side`\, n.
a man of great strength and endurance, especially on who is
brave.
[PJC] Ironside
The Collaborative International Dictionary of English v.0.48:
Ironside \I"ron*side`\, Ironsides \I"ron*sides`\, prop. n.
1. A nickname for Oliver Cromwell.
[PJC]
2. A nickname for Edmund II of England. --RHUD
[PJC]
WordNet (r) 3.0 (2006):
ironside
n 1: a man of great strength or bravery