1. The mental faculty of retaining and recalling past experience.
2. The act or an instance of remembering; recollection: spent the afternoon lost in memory.
3. All that a person can remember: It hasn't happened in my memory.
4. Something remembered: pleasant childhood memories.
5. The fact of being remembered; remembrance: dedicated to their parents' memory.
6. The period of time covered by the remembrance or recollection of a person or group of persons: within the memory of humankind.
7. Biology Persistent modification of behavior resulting from an animal's experience.
8. Computer Science a. A unit of a computer that preserves data for retrieval. b. Capacity for storing information: two gigabytes of memory.
9. Statistics The set of past events affecting a given event in a stochastic process.
10. The capacity of a material, such as plastic or metal, to return to a previous shape after deformation.
11. Immunology The ability of the immune system to respond faster and more powerfully to subsequent exposure to an antigen.