How do you pronounce Millennium?
noun, plural mil·len·ni·ums, mil·len·ni·a [mi-len-ee-uh].
What is the meaning of millennium?
b : a period of great happiness or human perfection. 2a : a period of 1000 years especially : one reckoned from the beginning of the Christian era at the start of the third millennium. b : a 1000th anniversary or its celebration In 2015 the city of Leipzig, Germany, celebrated its millennium.