3. tallness. Height, altitude, elevation refer to distance above a level. Height denotes extent upward (as from foot to head) as well as any measurable distance above a given level: The tree grew to a height of ten feet. They looked down from a great height. Altitude usually refers to the distance, determined by instruments, above a given level, commonly mean sea level: altitude of an airplane. Elevation implies a distance to which something has been raised or uplifted above a level: a hill's elevation above the surrounding country, above sea level. 5. prominence. 6. peak, pinnacle; acme, zenith; culmination.