The Collaborative International Dictionary of English v.0.48:

Integer \In"te*ger\, n. [L. integer untouched, whole, entire.
   See Entire.]
   A complete entity; a whole number, in contradistinction to a
   fraction or a mixed number.
   [1913 Webster]

   Complex integer (Theory of Numbers), an expression of the
      form a + b[root]-1, where a and b are real integers.
      [1913 Webster]

WordNet (r) 3.0 (2006):

integer
    n 1: any of the natural numbers (positive or negative) or zero;
         "an integer is a number that is not a fraction" [syn:
         integer, whole number]

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

integer
whole number

    (Or "whole number") One of the numbers in the set

    ..., -3, -2, -1, 0, 1, 2, 3, ...

   There are an infinite number of integers, though each one is
   finite.

   An inductive definition of an integer is a number that is either
   zero or an integer plus or minus one.

   An integer has no fractional part.  If written as a real
   number, e.g. 42.0, the part after the decimal point will be
   zero.

   A natural number is a non-negative integer.

   Computers usually store integers in binary.  Natural numbers can
   be stored as unsigned integers and integers that may be negative
   require a sign bit and typically use twos complement
   representation.  Other representations have been used, such as
   binary-coded decimal.

   Computers are particularly fast when operating on integers as
   the operations are built into the central processing unit,
   in contrast to floating point numbers, which typically
   require the use of a separate floating-point unit.

   (2019-08-31)