I only knew this word in the latter part of sense 2. It makes a lot more sense now as the name of a a missile-cruiser weapons system now that I have an understanding of the first sense as well. Though, now that I consider it, I should have known before this since the word is used in World of Warcraft.
1. A shield, or defensive armour; applied in ancient mythology to that of Jupiter or Minerva.
2. fig. A protection, or impregnable defence. Now freq. in senses ‘auspices, control, etc.’, esp. in phr. under the ægis (of).
3. attrib. and Comb., ægis-bearing, ægis-orb.
Now playing: Tabor, Ty - Tabor, Ty - 03 - Live in Your House