(1) A set of machine symbols that represents data or instructions. See
data code and
machine language.
(2) Any representation of one set of data for another. For example, a parts code is an abbreviated name of a product, product type or category. A discount code is a percentage.
(3) To write a program. See
coding,
source code and
line of code.
(4) To encode for security purposes. See
cryptography and
coding.