calm air
Học thuậtThân thiện
Definition
Noun: * Stillness; absence of wind: "Calm air" refers to a state of the atmosphere where there is no perceptible movement of wind. It is characterized by stillness and tranquility. * A specific meteorological condition: In technical contexts, it denotes wind moving at a speed of less than 1 knot, classified as 0 on the Beaufort scale of wind force.
Usage Examples
- Noun:
- After the storm passed, a period of calm air settled over the lake.
- The sailor waited for calm air before attempting to dock the small boat.
- On the Beaufort scale, calm air is indicated by smoke rising vertically.
Advanced Usage
- "dead calm air": An emphatic phrase describing a complete and absolute absence of wind.
- The sea was like a mirror under the dead calm air.
Variants and Related Words
- Calm (noun/adjective): The general state of peace, quiet, and absence of disturbance, which can apply to weather, seas, or emotions.
- The calm before the storm was eerie.
- Stillness (noun): A synonym emphasizing the lack of motion or sound.
- The stillness of the calm air was profound.
Synonyms
- Still air
- Windlessness
- Lull (a temporary period of calm)
Antonyms
- Wind
- Breeze
- Gale
- Storm
Related Phrases
- Flat calm: Often used in nautical contexts to describe a complete absence of wind and waves.
- The yacht was stranded in a flat calm for two days.
Noun
- wind moving at less than 1 knot; 0 on the Beaufort scale