HORIZONTAL meaning: 1. parallel to the ground or to the bottom or top edge of something: 2. a horizontal line…. Learn more. Definition of horizontal adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. 6 meanings: 1. parallel to the plane of the horizon; level; flat → Compare vertical (sense 1) 2. of or relating to the horizon.... Click for more definitions. Horizontal definition: at right angles to the vertical; parallel to level ground.. See examples of HORIZONTAL used in a sentence.
