The term 'module' can be defined in a variety of ways. The crossword solutions for the term 'module' include 'PART' (4 letters), 'COMPONENT' (9 letters), 'UNIT' (4 letters), 'ELEMENT' (7 letters), 'lunar' (5 letters), and 'COMMAND' (7 letters). A 'PART' is a distinct piece or segment of something larger, such as a machine or system. A 'COMPONENT' is a PART or ELEMENT of a larger system, such as a computer or engine. A 'UNIT' is a single thing, object, or group that is PART of a larger whole. An 'ELEMENT' is a basic COMPONENT of something, such as a chemical ELEMENT or an ELEMENT of a language. 'Lunar' refers to the moon or anything related to it. Finally, a 'COMMAND' is an order or instruction given by someone in authority.