memory 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. (dictionary.com)