Definition

1. Noun:
   • A millennium: A period of one thousand years. This is the core meaning, though it is rarely used alone in modern Vietnamese.
   • Used in literary or formal compounds: It is almost exclusively found in fixed, classical Sino-Vietnamese compounds to express extremely long, often indefinite, periods of time.

Usage Examples

• Noun (in compound):
  • Tình bạn của họ được ví như tình bạn thiên niên kỷ. (Their friendship is likened to a millennial friendship.)
  • Những truyền thống thiên niên vạn đại. (Traditions passed down for countless millennia.)

Advanced Usage

• The word "thiên niên" is an archaic Sino-Vietnamese term. In contemporary usage, it is not used independently. Its meaning is carried by the full compound "thiên niên kỷ" (millennium).
• It conveys a sense of vast, epochal time, often used in historical, philosophical, or poetic contexts.

Variants and Related Words

• Thiên niên kỷ (n): Millennium. The standard modern term for a period of one thousand years.

  • Chúng ta đang sống ở *thiên niên kỷ thứ ba.* (We are living in the third millennium.)

• Thiên niên vạn đại (idiomatic phrase): Literally "thousands of years and tens of thousands of generations"; means for all eternity, for countless ages.

  • Câu chuyện được lưu truyền *thiên niên vạn đại.* (The story is passed down for countless ages.)

Synonyms

• Millennium: A period of one thousand years.
• Aeon / Eon: An indefinite and very long period of time, often used in geological or philosophical contexts.

Related Idioms

• Thiên niên vạn đại: For eternity; for thousands upon thousands of years. This is the primary idiomatic expression containing "thiên niên."
  • Ước nguyện thiên niên vạn đại. (A wish for all eternity.)