Definition of thumb index noun from the Oxford Advanced Learner's Dictionary


thumb index

BrE BrE//ˈθʌm ɪndeks//
; NAmE NAmE//ˈθʌm ɪndeks//
jump to other results
a series of cuts in the edge of a book, with letters of the alphabet on them, to help you to find the section that you want more easily
See the Oxford Advanced American Dictionary entry: thumb index