Independence Day

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun July 4, celebrated in the United States to commemorate the adoption in 1776 of the Declaration of Independence.

from the GNU version of the Collaborative International Dictionary of English.

• In the United States, a holiday, the 4th of July, commemorating the adoption of the Declaration of Independence on that day in 1776.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun An annual celebration commemorating the anniversary of a nation's assumption of independent statehood.
• proper noun A holiday celebrated in the United States commemorating the country's independence from England, celebrated each year on the 4th of July.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a legal holiday in the United States