A millennium (pl. millennia or millenniums) is a period of one thousand years, one hundred decades, or ten centuries, [1][2] It is also sometimes called a kiloannum (ka) or kiloyear (ky).

Since in Latin mille means "thousand", a millennium lasts 1,000 years. Thus, we're living today at the beginning of the third millennium since the birth of Christ.

MILLENNIUM definition: 1. a period of 1,000 years, or the time when a period of 1,000 years ends: 2. the beginning of a…. Learn more.

A millennium is a period of one thousand years, especially one which begins and ends with a year ending in '000', for example the period from the year 1000 to the year 2000.

1. a. a period of 1000 years. b. one of the successive periods of 1000 years reckoned forward or backward from the assumed date of the birth of Jesus. 2. the millennium, the period of 1000 …

Millennium definition: A span of one thousand years.

MILLENNIUM definition: a period of 1,000 years. See examples of millennium used in a sentence.

MILLENNIUM meaning: 1 : a period of 1,000 years; 2 : a period of a thousand years counted from the beginning of the Christian era

Definition of millennium noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Factsheet What does the noun millennium mean? There are four meanings listed in OED's entry for the noun millennium. See ‘Meaning & use’ for definitions, usage, and quotation evidence.