1. Bible An angelic being who was cast from heaven as punishment for his rebellious pride. Lucifer is traditionally identified with Satan.
2. The planet Venus in its appearance as the morning star. Also called Phosphorus.
3. lucifer A friction match.
[Middle English, from Old English, morning star, Lucifer, from Latin Lūcifer, from lūcifer, light-bringer : lūx, lūc-, light; see leuk- in the Appendix of Indo-European roots + -fer, -fer.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.