'Morning sickness' definitions:

Definition of 'morning sickness'

From: WordNet
noun
Nausea early in the day; a characteristic symptom in the early months of pregnancy

Definition of 'Morning sickness'

From: GCIDE
  • 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