Source : Webster's Revised Unabridged Dictionary (1913)

Independence Day \In`de*pend"ence Day\
   In the United States, a holiday, the 4th of July,
   commemorating the adoption of the Declaration of Independence
   on that day in 1776.

Source : WordNet®

Independence Day
     n : a legal holiday in the United States [syn: {Fourth of July},
          {July 4}]