Length's the long dimension of any object. The length of a thing's the distance between its ends, its linear extent as measured from end to end. This may be distinguished from height, which's vertical extent, and width or breadth, which are the distance from side to side, measuring across the object at right angles to the length. In the physical sciences and engineering, the word "length"'s typically used synonymously with "distance", with symbol l or L or letter-like symbol ℓ. Length's… (More on Length)