Adverb (fukushi)
already; yet; by now; now; (not) any more; (not) any longer
彼はもう帰宅しました。He has already gone home. soon; shortly; before long; presently
further; more; again; another; the other
Interjection (kandoushi)
jeez; geez; gee; boy; come on; damn; seriously
used to strengthen expression of an emotion (often exasperation)
truly; really; extremely
Also written もー、もぉ