Definition of wails:
(v) :
(intransitive) To cry out, as in sorrow or anguish.
(v) :
(intransitive) To weep, lament persistently or bitterly.
(v) :
(intransitive) To make a noise like mourning or crying.
(n) :
A prolonged cry, usually high-pitched, especially as of grief or anguish.
(n) :
Any similar sound as of lamentation; a howl.
(v) :
(transitive) To lament; to bewail; to grieve over.