old ironsides meaning and definition

OLD IRONSIDES noun

Definition of Old Ironsides (noun)

1. a United States 44-gun frigate that was one of the first three naval ships built by the United States; it won brilliant victories over British frigates during the War of 1812 and is without doubt the most famous ship in the history of the United States Navy; it has been rebuilt and is anchored in the Charlestown Navy Yard in Boston
   • synonyms: Constitution