Definition of doubtless adverb from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈdaʊtləs//
; NAmE NAmE//ˈdaʊtləs//
(less frequent doubtlessly)
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almost certainly synonym without/beyond doubt He would doubtless disapprove of what Kelly was doing. Doubtless Williams, as the star of the movie, is getting five times the salary of everyone else.
See the Oxford Advanced American Dictionary entry: doubtless