A memorial account; a history composed from personal experience and memory; an account of transactions or events (usually written in familiar style) as they are remembered by the writer. See History, 2.
A memorial of any individual; a biography; often, a biography written without special regard to method and completeness.
An account of something deemed noteworthy; an essay; a record of investigations of any subject; the journals and proceedings of a society.
When you put down the good things you ought to have done, and leave out the bad ones you did do well, that's Memoirs. Will Rogers
The reader of these Memoirs will discover that I never had any fixed aim before my eyes, and that my system, if it can be called a system, has been to glide away unconcernedly on the stream of life, trusting to the wind wherever it led. Giacomo Casanova