n. One who remembers several words and phrases from a moribund language, but never became fluent in it.
the GNU version of the Collaborative International Dictionary of English
n. One who remembers.
The Century Dictionary and Cyclopedia
n. One who remembers.
Word Usage
"But because he's living apart from his little sister, Lili, he decides it's his job to be the "rememberer" - and write down everything that happens while they're growing up."