(1):

(adv. & conj.) Besides; except that mentioned; in addition; as, nowhere else; no one else.

(2):

(adv. & conj.) Otherwise; in the other, or the contrary, case; if the facts were different.

(3):

(a. & pron.) Other; one or something beside; as, Who else is coming? What else shall I give? Do you expect anything else?