Memory (noun)

1. The ability of the brain to store, retain, and recall information.
2. Something remembered from the past; a recollection.

Origin:

Middle english memorie, from old french memoire, from latin memoria, from memor mindful, from me- + -mor mindful.

Examples:

1. He has a good memory.
2. I have a memory of my childhood.
3. She has a photographic memory.
4. His memory is fading with age.
5. Memory is a key aspect of intelligence.