The Collaborative International Dictionary of English v.0.48:

Hail \Hail\, interj. [See Hail, v. t.]
   An exclamation of respectful or reverent salutation, or,
   occasionally, of familiar greeting. "Hail, brave friend."
   --Shak.
   [1913 Webster]

   All hail. See in the Vocabulary.

   Hail Mary, a form of prayer made use of in the Roman
      Catholic Church in invocation of the Virgin. See Ave
      Maria.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

All hail \All` hail"\ [All + hail, interj.]
   All health; -- a phrase of salutation or welcome.
   [1913 Webster]