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



BrE BrE//ˈmeɪnseɪl//
; NAmE NAmE//ˈmeɪnseɪl//
; BrE BrE//ˈmeɪnsl//
; NAmE NAmE//ˈmeɪnsl//
Parts of boats and ships
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the largest and most important sail on a boat or ship See related entries: Parts of boats and ships
See the Oxford Advanced American Dictionary entry: mainsail