What does alas mean?
The definition of alas
A*las”, interj.
Etym: [OE. alas, allas, OF. alas, F. hélas; a interj. (L. ah.) + las wretched (that I am), L. lassus weary, akin to E. late. See Late.]

An exclamation expressive of sorrow, pity, or apprehension of evil; — in old writers, sometimes followed by day or white; alas the day, like alack a day, or alas the white.