The Collaborative International Dictionary of English v.0.48:

digit \dig"it\ (d[i^]j"[i^]t), n. [L. digitus finger; prob. akin
   to Gr. da`ktylos, of uncertain origin; possibly akin to E.
   toe. Cf. Dactyl.]
   1. (Zool.) One of the terminal divisions of a limb appendage;
      a finger or toe.
      [1913 Webster]

            The ruminants have the "cloven foot," i. e., two
            hoofed digits on each foot.           --Owen.
      [1913 Webster]

   2. A finger's breadth, commonly estimated to be three fourths
      of an inch.
      [1913 Webster]

   3. (Math.) One of the ten figures or symbols, 0, 1, 2, 3, 4,
      5, 6, 7, 8, 9, by which all numbers are expressed; -- so
      called because of the use of the fingers in counting and
      computing.
      [1913 Webster]

   Note: By some authorities the symbol 0 is not included with
         the digits.
         [1913 Webster]

   4. (Anat.) One twelfth part of the diameter of the sun or
      moon; -- a term used to express the quantity of an
      eclipse; as, an eclipse of eight digits is one which hides
      two thirds of the diameter of the disk.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

digit \dig"it\, v. t.
   To point at or out with the finger. [R.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

digit
    n 1: one of the elements that collectively form a system of
         numeration; "0 and 1 are digits" [syn: digit, figure]
    2: the length of breadth of a finger used as a linear measure
       [syn: finger, fingerbreadth, finger's breadth, digit]
    3: a finger or toe in human beings or corresponding body part in
       other vertebrates [syn: digit, dactyl]

The Free On-line Dictionary of Computing (19 January 2023):

digit

   An employee of Digital Equipment Corporation.  See also
   VAX, VMS, PDP-10, TOPS-10, DEChead, double
   DECkers, field circus.

   [Jargon File]