module Definition

module
noun

1. A separate self-contained unit that combines with others to form a larger unit, structure or system.
2. In a space vehicle: a separate self-contained part used for a particular purpose.

Example: lunar module
3. education.
A set course forming a unit in a training scheme, degree programme, etc.
4. archit.
A measure, eg the semi-diameter of a column, used to fix the proportions of other parts.

Etymology: 16c: French, from Latin modulus a small measure.