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English definition of “thumbnail”

thumbnail

noun [C]  /ˈθʌmˌneɪl/ us  

thumbnail noun [C] (ON FINGER)

the nail on the thumb

thumbnail noun [C] (SMALL PICTURE)

a small copy of a larger picture on a computer, shown in this way to allow more to be seen on the screen: You can choose whether you would like to view your photos as thumbnails or in a slide show. thumbnail images

thumbnail

adjective [not gradable]  /ˈθʌmˌneɪl/ us  

thumbnail adjective [not gradable] (SMALL)

shorter or smaller than the usual length or size: a thumbnail profile of the author He gave a thumbnail sketch (= a short description) of life in Moscow in the 1960s.
(Definition of thumbnail from the Cambridge Academic Content Dictionary © Cambridge University Press)
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