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出典:Wiktionary
出典:『Wiktionary』 (2026/03/30 16:32 UTC 版)
From Middle French visibilité, from Late Latin visibilitas; equivalent to visible + -ity.
visibility (countable and uncountable, plural visibilities)
出典:Wikipedia
出典:『Wikipedia』 (2011/05/25 18:17 UTC 版)
In meteorology, visibility is a measure of the distance at which an object or light can be clearly discerned. It is reported within surface weather observations and METAR code either in meters or statute miles, depending upon the country. Visibility affects all forms of traffic: roads, sailing and aviation. Meteorological visibility refers to transparency of air: in dark, meteorological visibility is still the same as in daylight for the same air.
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