ə.ˈkjum.jə.ˌleɪ.tɚ kəˈlɛktɚ kəˈlɛktə(ɹ) (computer science) a register that has a built-in adder that adds an input number to the contents of the register a voltaic battery that stores electric charge a person who is employed to collect payments (as for rent or taxes)