Source : Webster's Revised Unabridged Dictionary (1913)

Lucifer \Lu"ci*fer\, n. [L., bringing light, n., the morning
   star, fr. lux, lucis, light + ferre to bring.]
   1. The planet Venus, when appearing as the morning star; --
      applied in Isaiah by a metaphor to a king of Babylon.

            How art thou fallen from heaven, O Lucifer, son of
            the morning ! how art thou cut down to the ground
            which didst weaken the nations !      --Is. xiv. 12.

            Tertullian and Gregory the Great understood this
            passage of Isaiah in reference to the fall of Satan;
            in consequence of which the name Lucifer has since
            been applied to, Satan.               --Kitto.

   2. Hence, Satan.

            How wretched Is that poor man that hangs on princes'
            favors! . . . When he falls, he falls like Lucifer,
            Never to hope again.                  --Shak.

   3. A match made of a sliver of wood tipped with a combustible
      substance, and ignited by friction; -- called also
      {lucifer match}, and {locofoco}. See {Locofoco}.

   4. (Zo["o]l.) A genus of free-swimming macruran Crustacea,
      having a slender body and long appendages.