Pronunciation: (sin'dur),[key] —n. 1. a partially or mostly burned piece of coal, wood, etc.
2. cinders, a. any residue of combustion; ashes.
b. Geol.coarse scoriae erupted by volcanoes.
3. a live, flameless coal; ember.
4. Metall. a. slag (def. 1).
b. a mixture of ashes and slag.
—v.t. 1. to spread cinders on: The highway department salted and cindered the icy roads. 2. Archaic.to reduce to cinders.
—v.i. to spread cinders on a surface, as a road or sidewalk: My neighbor began cindering as soon as the first snowflake fell.