The Collaborative International Dictionary of English v.0.48:

Morning \Morn"ing\, a.
   Pertaining to the first part or early part of the day; being
   in the early part of the day; as, morning dew; morning light;
   morning service.
   [1913 Webster]

         She looks as clear
         As morning roses newly washed with dew.  --Shak.
   [1913 Webster]

   Morning gown, a gown worn in the morning before one is
      dressed for the day.

   Morning gun, a gun fired at the first stroke of reveille at
      military posts.

   Morning sickness (Med.), nausea and vomiting, usually
      occurring in the morning; -- a common sign of pregnancy.


   Morning star.
   (a) Any one of the planets (Venus, Jupiter, Mars, or Saturn)
       when it precedes the sun in rising, esp. Venus. Cf.
       Evening star, Evening.
   (b) Satan. See Lucifer.
       [1913 Webster]

             Since he miscalled the morning star,
             Nor man nor fiend hath fallen so far. --Byron.
       [1913 Webster]
   (c) A weapon consisting of a heavy ball set with spikes,
       either attached to a staff or suspended from one by a
       chain.

   Morning watch (Naut.), the watch between four a. m. and
      eight a. m..
      [1913 Webster] Morning glory

WordNet (r) 3.0 (2006):

morning sickness
    n 1: nausea early in the day; a characteristic symptom in the
         early months of pregnancy