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Definition of Okta
1. Noun. (meteorology) One eighth of the total area of the celestial dome; used as a measure of cloudiness (one okta means that one eighth of the sky is obscured, two oktas that one quarter is obscured, and so on). ¹
¹ Source: wiktionary.com
Definition of Okta
1. a unit of measure of cloud cover [n -S]