The noun memory has 5 senses (first 4 from tagged texts)
1. (25) memory -- (something that is remembered; "search as he would, the memory was lost")
2. (15) memory, remembering -- (the cognitive processes whereby past experience is remembered; "he can do it from memory"; "he enjoyed remembering his father")
3. (9) memory, retention, retentiveness, retentivity -- (the power of retaining and recalling past experience; "he had a good memory when he was younger")
4. (3) memory, computer memory, storage, computer storage, store, memory board -- (an electronic memory device; "a memory and the CPU form the central part of a computer to which peripherals are attached")
5. memory -- (the area of cognitive psychology that studies memory processes; "he taught a graduate course on learning and memory")