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n. pl. mem·o·ries
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 that is 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. Computers
a. A circuit or device that stores digital data.
b. Capacity for storing information: two gigabytes of memory.
8. Statistics The set of past events affecting a given event in a stochastic process.
9. The capacity of a material, such as plastic or metal, to return to a previous shape after deformation.
10. Immunology The ability of the immune system to respond faster and more powerfully to subsequent exposure to an antigen.

[Middle English memorie, from Anglo-French, from Latin memoria, from memor, mindful; see (s)mer-1 in the Appendix of Indo-European roots.]


1. 'memoirs'

When someone writes their memoirs, they write a book about people and events that they remember.

He was busy writing his memoirs.
They're making a movie of his war memoirs.
2. 'memories'

You do not use 'memoirs' to refer to things that you remember about the past. The word you use is memories.

My memories of a London childhood are happy ones.
One of my earliest memories is of a total eclipse of the sun.
References in classic literature ?
It was excellent drill for their memories, a harmless amusement, and employed many hours which otherwise would have been idle, lonely, or spent in less profitable society.
Certainly his kind have left horrible unconscious memories in all warm-blooded life.
He had certain recollections of racing in what he called "the good old times" when the Lecompte stables flourished, and he drew upon this fund of memories so that he might not be left out and seem wholly devoid of the modern spirit.
In the feverish, pulsating life of the young metropolis they often stopped oppressed, giddy, and choking; the roar of the streets and thoroughfares was meaningless to them, except to revive strange memories of the deep, unvarying monotone of the evening wind over their humbler roof on the Sierran hillside.
It is not the less certain, however, that awe and terror brooded over the memories of those who died for this horrible crime of witchcraft.
So Roger Chillingworth -- a deformed old figure with a face that haunted men's memories longer than they liked -- took leave of Hester Prynne, and went stooping away along the earth.
A very few of them, in fact, passing, in constant sight of my pupils, without a fresh incident, sufficed to give to grievous fancies and even to odious memories a kind of brush of the sponge.
For twenty-five years old Antanas Rudkus and his son had dwelt in the forest together, and it was hard to part in this way; perhaps it was just as well that Jurgis had to give all his attention to the task of having a funeral without being bankrupted, and so had no time to indulge in memories and grief.
The great difference is, that the table and chair cannot feel, and the man can; for even a legal enactment that he shall be "taken, reputed, adjudged in law, to be a chattel personal," cannot blot out his soul, with its own private little world of memories, hopes, loves, fears, and desires.
So long as the planets shall continue to move in their orbits, the BATTLE OF THE SAND-BELT will not perish out of the memories of men.
They had their red guide-books open at the diagram of the view, and were painfully picking out the several mountains and trying to impress their names and positions on their memories.
Here was a gorgeous triumph; they were missed; they were mourned; hearts were breaking on their account; tears were being shed; accusing memories of unkindness to these poor lost lads were rising up, and unavailing regrets and re- morse were being indulged; and best of all, the depart- ed were the talk of the whole town, and the envy of all the boys, as far as this dazzling notoriety was con- cerned.