Pronunciation: (els),[key] —adj. 1. other than the persons or things mentioned or implied: What else could I have done? 2. in addition to the persons or things mentioned or implied: Who else was there? 3. other or in addition (used in the possessive following an indefinite pronoun): someone else's money.
—adv. 1. if not (usually prec. by or): It's a macaw, or else I don't know birds. 2. in some other way; otherwise: How else could I have acted? 3. at some other place or time: Where else might I find this book? 4. or else, or suffer the consequences: Do what I say, or else.