Oxford Advanced American Dictionary

Definition of else adverb from the Oxford Advanced Learner's Dictionary

 Oxford3000

else

adverb
else pronunciation English els else pronunciation American els
 
(used in questions or after nothing, nobody, something, anything, etc.)1 in addition to something already mentionedWhat else did he say?I don't want anything else, thanks.I'm taking a few clothes and some books, not much else.2 differentAsk somebody else to help you.Haven't you got anything else to wear?Why didn't you come? Everybody else was there.Yes I did give it to her. What else could I do?
Idioms

or else

1 if not
Synonym
otherwiseHurry up or else you'll be late.They can't be coming or else they'd have called.2 used to introduce the second of two possibilitiesHe either forgot or else decided not to come.3 (informal) used to threaten or warn somebodyJust shut up, or else!