- perpendicular
- adj1. vertical, on end, upright, at right angles to, right-angular, Geom. at 90 degrees to; plumb, straight, straight-up-and-down, up-and-down; bolt-upright, standing, standing upright.2. steep, sharp, sheer, precipitous; abrupt, bold, craggy, high.n3. upright, vertical, plumb, plumb line, perpendicular line or plane; straight angle.4. rectitude, morality, moral uprightness, virtue, integrity, uncorruptibility; equity, fairness, honesty, trustworthiness; righteousness, uprightness, goodness, purity, impeccability; veracity, probity, truthfulness; conscientiousness, scrupulousness, honor, fidelity, faithfulness.5. cliff, precipice, crag, bluff, rocky eminence; scarp, escarpment, incline, tor, spine, ridge, headland.
A Note on the Style of the synonym finder. 2014.