module

n. component, unit, subsystem; part of a computer program which may be run separately (Computers)

A module is a self-contained component of a system, which has a well-defined interface to the other components; something is modular if it includes or uses modules which can be interchanged as units without disassembly of the module. Design, manufacture, repair, etc. of the modules may be complex, but this is not relevant; once the module exists, it can easily be connected to or disconnected from the system.
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Noun
1. one of the inherent cognitive or perceptual powers of the mind
(synonym) faculty, mental faculty
(hypernym) ability, power
(hyponym) attention
2. detachable compartment of a spacecraft
(hypernym) compartment
(hyponym) command module
(part-holonym) spacecraft, ballistic capsule, space vehicle
3. computer circuit consisting of an assembly of electronic components (as of computer hardware)
(hypernym) computer circuit
(classification) computer, computing machine, computing device, data processor, electronic computer, information processing system
4. a self-contained component (unit or item) that is used in combination with other components
(hypernym) component, constituent, element
(hyponym) cartridge
(part-holonym) system

n. module; part of a computer program which may be run separately (Computers)

n. module, component, unit

v. modulate, regulate, control; adjust; vary the frequency (Electronics); change from one key to another (Music)