Which is correct, "underway" or "under way"?

Under way is an adverb ("The coronation weekend is under way"), but underway is an adjective ("The underway coronation weekend is being marred by a lot of rain in much of England").

Who says English isn't a simple language!?

under weigh

Thank you. I just saw a signboard saying

" THE JUBILATION IS UNDER WAY" in a London subway station on CNN news. Hence this question.

Both are correct. Can be spelt as one word or as two separate ones.

outta the damn way!

"Underway" is correct.

Underway. :)

Way under

one word

one word

Depends if it comes before a noun or after a verb