Morning star Meaning, Definition & Usage

  1. noun a planet (usually Venus) seen just before sunrise in the eastern sky
    daystar; Phosphorus; Lucifer.

WordNet

Definitions
  1. . (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.
    Since he miscalled the morning star, Nor man nor fiend hath fallen so far. Byron.
    (c) A weapon consisting of a heavy ball set with spikes, either attached to a staff or suspended from one by a chain.

Webster 1913