Last Updated:2025/11/20
(physics) The speed of electromagnetic radiation; in a perfect vacuum it is defined as 299,792,458 metres per second / (colloquial, figuratively) A very rapid speed.
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speed of light
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Source Word
speed of light
Noun
colloquial
figuratively
Japanese Meaning
(物理学)電磁放射の速度で、真空中では299,792,458メートル毎秒と定義される速度。 / (口語、比喩的表現)非常に高速な状態や動作、極めて速いスピード。
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( plural )
( abbreviation common-gender )