Definition

1. Noun:
   • Command flag / Signal flag: A flag used to convey orders, commands, or signals, especially within a military, naval, or organized group context. It functions as a visual tool for communication and control.
   • Semaphore flag: In specific contexts, it can refer to one of a pair of flags used in a system of sending messages by holding the arms in particular positions.

Usage Examples

• Noun:
  • Người chỉ huy vẫy cờ lệnh để ra hiệu tấn công. (The commander waved the command flag to signal the attack.)
  • Thủy thủ phải hiểu rõ ý nghĩa của từng lá cờ lệnh. (Sailors must understand the meaning of each signal flag.)
  • Họ truyền tin bằng cách sử dụng cờ lệnh. (They communicated by using semaphore flags.)

Advanced Usage

• Historically, "cờ lệnh" was a crucial tool for commanding troops on the battlefield before the advent of modern electronic communication.

Variants and Related Words

• Cờ hiệu (n): signal flag; a flag used as a sign or signal.
• Cờ semaphore (n): semaphore flag; specifically refers to flags used in the semaphore signaling system.

Synonyms

• Signal flag: A flag used to send a message or signal.
• Ensign: A flag or standard, especially a military or naval one indicating nationality.
• Pennant: A long, narrow flag, often used for signaling or identification.

Related Idioms

• Phất cờ lệnh: To raise/give the command flag; metaphorically means to initiate an action or campaign.
  • Giám đốc phất cờ lệnh cho chiến dịch marketing mới. (The director gave the signal to start the new marketing campaign.)