memory

n. (pl. -ies) 1 faculty by which things are recalled to or kept in the mind. 2 a this in an individual (my memory is failing). B store of things remembered (deep in my memory). 3 recollection; remembrance, esp. Of a person etc.; person or thing remembered (memory of better times; his mother's memory). 4 storage capacity of a computer etc. 5 posthumous reputation (his memory lives on; of blessed memory). 6 length of remembered time of a specific person, group, etc. (within living memory). 7 remembering (deed worthy of memory).  from memory as remembered (without checking). In memory of to keep alive the remembrance of. [latin memoria from memor mindful]

n. The faculty of the mind by which it retains the knowledge of previous thoughts, impressions, or events.