1. 1. A human finger or toe.
   2. A corresponding part in other vertebrates.
2. A unit of length derived from the breadth of a finger and equal to about ³/₄ of an inch (2.0 centimeters).
3. 1. One of the ten Arabic number symbols, 0 through 9.
   2. Such a symbol used in a system of numeration.

[Middle English, from Latin digitus, finger, toe.]

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.