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).

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

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 meaning: 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.

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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.

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

Dec 14, 2025 · This is the period commonly called the Millennium. The seat of His power will be Jerusalem, and the saints, including the saved of the Dispensation of Grace, viz., the Church, …

List of decades, centuries, and millennia The list below includes links to articles with further details for each millennium, century and decade from 15,000 BC to AD 3000.