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okta Line breaks: okta
Pronunciation: /ˈɒktə/

Entry from British & World English dictionary

Definition of okta in English:

noun (plural same or oktas)

A unit used in expressing the extent of cloud cover, equal to one eighth of the sky.
Example sentences
  • The amount of sky covered is typically measured in oktas, eighths of sky cover, a non-linear scale.
  • Overcast skies (typically 7-8 okta of stratus) reduced exposures by a mean of 54%.
  • It was 0.2 + / 0.06 (54% of clear sky conditions) for activities in which cloud cover was measured at 7 okta or greater.


1950s: alteration of octa-.

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