millennial

adjective

• 1denoting or relating to a period of a thousand years:the current increase in hurricanes is only a small fluctuation within this longer millennial cycle

• 2denoting or relating to an anniversary of a thousand years:the millennial anniversary of Leif Eiriksson’s voyage to the New World the millennial celebrations in New York’s Times Square
• denoting those people reaching young adulthood around the year 2000:most social networking groups are dominated by the millennial generation

• 3another term for millenarian.

noun

• a person reaching young adulthood around the year 2000:the industry brims with theories on what makes millennials tick generation Xers and millennials have some real gripes about the world their parents constructed