Fourth of July UK /ˌfɔːθ‿əv d͡ʒʊˈlaɪ/US /ˌfɔɹθ‿əv d͡ʒəˈlaɪ/ noun2 •The national holiday of Independence Day in the United States, celebrated (commonly with fireworks) on the fourth day in July to mark the anniversary of the signing of the Declaration of Independence from Great Britain in 1776.Our Fourth of Julys are sounding different, too. Come to one of our barbeques and you might hear “Praise the Lord and Pass the Metamucil” or that ol’ patriotic favorite “Let Eardrums Ring.” — 2005 •(US) A cocktail containing one part grenadine syrup, one part vodka, and one part blue curaçao, reminiscent of the red, white, and blue colors of the United States flag, often poured in layers so that the colors do not mix when the drink is served.