Definition

1. Noun:

   • A whirring or buzzing sound: A continuous, rapid, vibrating sound, often produced by something spinning or moving quickly through the air.
   • The basic monetary unit of Ethiopia: The primary unit of currency in Ethiopia, subdivided into 100 cents.

2. Verb:

   • To make a whirring sound: To move or operate with a continuous, rapid, vibrating noise.

Examples of Usage

• Noun (Sound):

  • The birr of the helicopter's rotor blades filled the air.
  • He listened to the gentle birr of the computer's cooling fan.

• Noun (Currency):

  • The price is fifty Ethiopian birr.
  • She exchanged her dollars for local birr at the bank.

• Verb:

  • The old ceiling fan began to birr softly.
  • Insects birred in the warm summer evening.

Advanced Usage

• Technical/Descriptive Use: Often used in literary or technical contexts to describe mechanical or natural sounds with precision.
  • The birr of the sewing machine was a constant background noise in the workshop.

Variants and Related Words

• Whir (noun/verb): A more common synonym for the sound-related meanings of "birr."
• Whirring (adj/noun): Describing or related to a birring sound.

Synonyms

• Whir (for sound): Buzz, hum, drone, whizz.
• Currency Unit: (No direct synonym; it is a proper noun for the Ethiopian currency).

Related Phrases

• To give a birr: (Less common) Can imply causing something to start making such a sound.
  • He gave the engine a birr before it settled into a steady hum.

Noun

1. sound of something in rapid motion
   • whir of a bird's wings
   • the whir of the propellers
2. the basic unit of money in Ethiopia; equal to 100 cents

Verb

1. make a soft swishing sound
   • the motor whirred
   • the car engine purred