The first dimension, the measurement of the distance from the level of the lowest point to the level of the highest point of a shape or space. The height of this see thumbnail to rightblack square is 115 pixels.Quote: Before he became president of the USA, Abraham Lincoln took part in a series of political debates with a fellow named Douglas. In an obvious reference to the difference in height between Lincoln and Douglas (a much shorter man), a heckler asked, "Tell us, Mr. Lincoln, how long do you think a man's legs ought to be?" Lincoln replied, "Long enough to reach the ground." Abraham Lincoln (1809-1865), president (1861-1865) during America's Civil War; emancipator of slaves.Also see depth, direction, length, width, and vertical.