virtual address logical address 1. <architecture> A memory location accessed by an {application program} in a system with {virtual memory} such that intervening hardware and/or software maps the virtual address to real ({physical}) memory. During the course of execution of an application, the same virtual address may be mapped to many different {physical addresses} as data and programs are {paged out} and {paged in} to other locations. 2. In {IBM}'s {VM} {operating system}, {Virtual Device Location}. (2001-01-02)