Memory refers to the processes that are used to acquire, store, retain, and later retrieve information. There are three major processes involved in memory: encoding, storage, and retrieval.
Human memory involves the ability to both preserve and recover information we have learned or experienced. As we all know, however, this is not a flawless process. Sometimes we forget or misremember things.
Definition according to Psychology Dictionary:
Memory is the ability to understand and then internalize information into the memory stores based on the processes of learning, encoding, retention and then retrieval and reactivation of a memory when stimulated. Research has implied that for every fact or memory, a new neuron is formed in the brain.