Definition of When Johnny Comes Marching Home from the Oxford Advanced Learner's Dictionary

When Johnny Comes Marching Home

 
;
 
 
a song from the American Civil War which was popular with people on both sides. It was written in 1863 by Patrick Gilmore (1829–92) who was born in Ireland. The first verse is:When Johnny comes marching home again, hurrah! Hurrah!We’ll give him a hearty welcome then, hurrah! Hurrah!The men will cheer, the boys will shout,The ladies, they will all turn out,And we’ll all feel gay, when Johnny comes marching home.