Any of various butterflies of the subfamily Charaxinae.
A large, relatively valuable marble in children's games.
Specifically, the ruler of the Holy Roman Empire; the world-monarch.
Any of various large dragonflies of the cosmopolitan genus Anax.
An emperor penguin.
The fourth trump or major arcana card of the tarot deck.
The male monarch or ruler of an empire.
Any monarch ruling an empire, irrespective of gender, with "empress" contrasting to mean the consort of an emperor.
Any fish of the family Lethrinidae.
Any of various nymphalid butterflies of the genus Tanaecia. Other butterflies in this genus are called earls and counts.
A member of the peerage, above a baron but below a count or earl.