VARIABLE

Definition

1. adjective liable to or capable of change.
2. adjective marked by diversity or difference. — synonyms: varying
3. adjective (used of a device) designed so that a property (as e.g. light) can be varied.
4. noun something that is likely to vary.
5. noun a quantity that can assume any of a set of values. — synonyms: variable_quantity
6. noun a star that varies noticeably in brightness. — synonyms: variable_star
7. noun a symbol (like x or y) that is used in mathematical or logical expressions to represent a variable quantity.