Elegy

Etymology

From Greek "elegos" (a mournful song), through Latin "elegia" and French "élégie." In ancient use it named verse in a particular meter, only later narrowing to poems of lament regardless of form; the sound of grief came to define the word more than its metrics.

noun · /EL-ih-jee/
A mournful poem or song, especially a lament for the dead.
What it names
Grief given artistic form — sorrow shaped into something that can be read and reread — a genre, not just an outpouring.
Example
The poem was an elegy for a whole vanished town, not just for the grandmother it named.
Related idea
An elegy is a poem of lament and mourning; a eulogy is a speech of praise for someone who has died — one grieves in verse, the other honors in oratory, and they need not overlap.