Definition of thumbnail sketch noun from the Oxford Advanced Learner's Dictionary


thumbnail sketch

BrE BrE//ˌθʌmneɪl ˈsketʃ//
; NAmE NAmE//ˌθʌmneɪl ˈsketʃ//
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a short description of something, giving only the main details The first chapter provides a thumbnail sketch of the social and political climate of the US in the 1960s.
See the Oxford Advanced American Dictionary entry: thumbnail sketch