olemus
Wiktionary, noun:
2. something whose value may be dictated or discovered
3. (mathematics) a quantity that may assume any one of a set of values
4. (mathematics) a symbol representing a variable
5. (programming) a named memory location in which a program can store intermediate results and from which it can read them

ülevaateid
https://en.wikipedia.org/wiki/Variable_(mathematics)
https://en.wikipedia.org/wiki/Variable_(computer_science)
https://en.wikipedia.org/wiki/Variable_and_attribute_(research)