a special kind of variable
a symbolic name assigned to a character or numeric constant
a variable that has been initialized and has the PARAMETER attribute
a variable whose value is assigned when it is declared and whose value cannot be changed
(n.) a constant that has a name. In Fortran 77 this is known as a symbolic constant.
variable that is defined by Common Lisp, by the implementation, or by user code (see the macro defconstant) to always yield the same value when evaluated. The value of a named constant may not be changed by assignment or by binding.
variable whose value cannot be changed by the program after initialisation.
A constant that has a name. In FORTRAN 77, this term was called a symbolic constant.