<computer programming> To add features to a program, especially through the use of hooks.

"Extend" is very often used in the phrase "extend the functionality of a program."

Plug-ins are one form of extension.

(01 Mar 1997)

To straighten a limb, to diminish or extinguish the angle formed by flexion; to place the distal segment of a limb in such a position that its axis is continuous with that of the proximal segment.

Origin: L. Ex-tendo, pp. -tensus, to stretch out

(05 Mar 2000)