Definition of isthmus noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈɪsməs//
; NAmE NAmE//ˈɪsməs//
Other geographic regions
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a narrow strip of land, with water on each side, that joins two larger pieces of land See related entries: Other geographic regions Word Originmid 16th cent.: via Latin from Greek isthmos.
See the Oxford Advanced American Dictionary entry: isthmus