Definition of columbus day in English English dictionary
A US national holiday celebrated on the second Monday in October, for Christopher Columbus' discovery
October 12, observed in the United States in commemoration of the discovery in 1492 of the New World by Christopher Columbus. Columbus Day is now officially observed on the second Monday in October. a US public holiday held on October 12th to honour Christopher Columbus
The 12th day of October, on which day in 1492 Christopher Columbus discovered America, landing on one of the Bahama Islands (probably the one now commonly called Watling Island), and naming it "San Salvador"; called also Discovery Day