Vertical climbing anchor systems. vertical, perpendicular, plumb mean being at right angles to a base line. adj. VERTICAL meaning: 1. vertical synonyms, vertical pronunciation, vertical translation, English dictionary definition of vertical. It has many names, often related to particular meanings: Sheffer stroke (in logic), pipe, bar, or (literally, the word "or"), vbar, and others. 1. Vertical describes something that rises straight up from a horizontal line or plane. See examples of VERTICAL used in a sentence. Definition of vertical adjective in Oxford Advanced Learner's Dictionary. Vertical definition: being in a position or direction perpendicular to the plane of the horizon; upright; plumb. 5lv4r8fmo8duoxteml9tkreteqcqvivijoy4hrlc4jsmcsvlrw