Definition

Noun: - Decade: A period of ten years. This is the standard and most common meaning, used for grouping and measuring time in ten-year intervals.

Usage Examples

• Noun:
  • Thập kỷ tới sẽ có nhiều thay đổi công nghệ. (The next decade will see many technological changes.)
  • Cô ấy đã sống ở đây hơn ba thập kỷ. (She has lived here for more than three decades.)
  • Những năm 1990 là một thập kỷ quan trọng. (The 1990s were an important decade.)

Advanced Usage

• The term is used in historical, sociological, and economic contexts to categorize and analyze periods (e.g., "the postwar decades," "the first decade of the 21st century").
• It is often used with ordinal numbers (e.g., – the fifth decade) or to refer to specific sets of years (e.g., – the 80s decade).

Variants and Related Words

• Thập niên (n): This is a direct synonym for "thập kỷ," also meaning "decade." Usage is virtually identical.
  • Thập niên 60 đầy biến động. (The 60s decade was full of upheaval.)

Synonyms

• Decade: A period of ten years.
• Ten-year period: A more descriptive synonym.

Notes on Usage

• "Thập kỷ" and "thập niên" are interchangeable in modern Vietnamese. Some stylistic or regional preferences may exist, but both are correct.
• It is commonly used with definite articles (e.g., – this decade) or possessive constructions (e.g., – a decade of innovation).
• Avoid confusing it with thế kỷ (century), which is a period of one hundred years.

noun

1. decade