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Glossary of Meteorological Terms
beginning with letter O
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occlude Tweet Definition of occlude Like Definition of occlude on Facebook
verb (occlud, ing)
  1. To obstruct, cover, or otherwise block an opening.
     
occluded front Tweet Definition of occluded front Like Definition of occluded front on Facebook
noun 
  1. (Meteorology). An occluded front occurs when a cold front overtakes a warm front at the surface and a temperature contrast exists between the advancing and retreating cold air masses.
     
overcast Tweet Definition of overcast Like Definition of overcast on Facebook
noun 
  1. (obsolete) An outcast.
  2. A cloud covering all of the sky.
verb (overcast, ing)
  1. (context, transitive, obsolete) To overthrow.
  2. (transitive) To cover with cloud; to overshadow; to darken.
  3. (transitive) To make gloomy; to depress.
  4. (context, intransitive, obsolete) To be or become cloudy.
  5. (context, transitive, obsolete) To transform.
adjective 
  1. Covered with clouds; overshadowed; darkened.
  2. (meteorology) The sky is said to be , when it is more than 90% covered by clouds.
  3. In a state of depression; gloomy; melancholy.
     
ozone layer Tweet Definition of ozone layer Like Definition of ozone layer on Facebook
noun 
  1. A region of the stratosphere, between 15 and 30 kilometres in altitude, containing a relatively high concentration of ozone; it absorbs most solar ultraviolet radiation
     

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