n. 1 a standardized part or independent unit used in construction, esp. of furniture, a building, or an electronic system. 2 an independent self-contained unit of a spacecraft (lunar module). 3 a unit or period of training or education. 4 a a standard or unit of measurement. b Archit. a unit of length for expressing proportions, e.g. the semidiameter of a column at the base.
[ F module or L modulus: see MODULUS ]