plug-in

Definition: Application software that works in conjunction with a host program into which it is 'plugged' so that it appears in a menu, pretending to be part of the program itself. * This 'open architecture' of software is much used to improve productivity and also to correct defects of host program: e.g. for some, the numerous plug-ins (called XTensions) for Quark Xpress only prove how deficient the basic programme was in the first place. On the other hand, one need install only those plug-ins that are needed. * Also used with applications to interface the program with a device such as digital camera or scanner e.g. the 'acquire' plug-ins for Photoshop.

Related Terms: TWAIN

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