monocularPronunciation: /məˈnɒkjʊlə/Definition of monocular adjective with, for, or in one eye:he had only monocular vision noun an optical instrument for viewing distant objects with one eye, resembling one half of a pair of binoculars. Derivatives monocularly adverb Origin: mid 17th century: from late Latin monoculus 'having one eye' + -ar1monocular in other Oxford dictionaries Definition of monocular in the US English dictionary