Definition

1. Proper noun:
   • The Pentagon: The headquarters of the United States Department of Defense, located in Arlington, Virginia. The name derives from its distinctive five-sided (pentagonal) shape.
   • The U.S. military leadership / establishment: By metonymy, the term is often used to refer to the leadership and bureaucracy of the U.S. Department of Defense.

Usage Examples

• Proper noun:
  • Ngũ Giác Đài là một trong những tòa nhà văn phòng lớn nhất thế giới. (The Pentagon is one of the world's largest office buildings.)
  • Phát ngôn viên của Ngũ Giác Đài đã đưa ra tuyên bố vào chiều nay. (A Pentagon spokesperson issued a statement this afternoon.)
  • Các tướng lĩnh tại Ngũ Giác Đài đang thảo luận về chiến lược mới. (Generals at the Pentagon are discussing the new strategy.)

Advanced Usage

• "Ngũ Giác Đài" as a symbol: The term can symbolize U.S. military power, policy, and decision-making.
  • Những quyết định từ Ngũ Giác Đài có thể ảnh hưởng đến tình hình toàn cầu. (Decisions from the Pentagon can affect the global situation.)

Variants and Related Words

• Lầu Năm Góc: This is a direct, word-for-word translation ("Five-Sided Building") and a common alternative name in Vietnamese for The Pentagon. It is used interchangeably with "Ngũ Giác Đài".
  • Tin tức từ Lầu Năm Góc cho biết cuộc họp đã kết thúc. (News from the Pentagon indicated the meeting had concluded.)

Synonyms

• Bộ Quốc phòng Mỹ (U.S. Department of Defense): Refers to the institution itself, which is headquartered at the Pentagon.
• Trụ sở Bộ Quốc phòng Mỹ (Headquarters of the U.S. Department of Defense): A descriptive term for the building.

Notes on Usage

• Capitalization: In Vietnamese, "Ngũ Giác Đài" is typically capitalized as it is a proper noun referring to a specific entity.
• Context: The word is almost exclusively used in contexts related to U.S. defense, military affairs, politics, and international relations. It is not a generic term for any pentagonal building.

1. The Pentagon