Independence Day noun
Learner's definition of INDEPENDENCE DAY
[noncount]
: a holiday celebrating the anniversary of a country's independence from another country that ruled it in the past
especially : July 4 celebrated as a legal holiday in the U.S. in honor of the day when the Declaration of Independence was signed in 1776独立纪念日；（尤指）7月4日的美国法定假日（庆祝1776年《独立宣言》的签署）