(computing) Created or defined by the user of a system, rather than being included in the original package.

Alternative form of predefined

(computing) A program or subroutine, provided by the user rather than being built into the system, that may return a value and may take input parameters.

(computing, dated) A graphic symbol defined by the user, replacing one of the text characters in the computer's character set.

plural of software defined radio

(telecommunications) A radio that creates and receives radio signals through software controlled DSPs (digital signal processors) with ADCs (analog-to-digital converters) and DACs (digital-to-analog converters).

plural of user-defined graphic

plural of user-defined function

In a way that defines something.