Usually refers to the longest dimension. Synonyms for lengthwise are longtitudinal and axial.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 angstrom, axial plan, depth, direction, font, height, longtitudinal, measure, nail, straight, type, typeface, text, thickness, and width.