1. a partially or mostly burned piece of coal, wood, etc.
  2. cinders,
    1. any residue of combustion; ashes.
    2. Geology.coarse scoriae erupted by volcanoes.
  3. a live, flameless coal; ember.
  4. Metallurgy.
    1. slag1(def 1).
    2. a mixture of ashes and slag.
verb (used with object)
  1. to spread cinders on: The highway department salted and cindered the icy roads.
  2. Archaic. to reduce to cinders.
verb (used without object)
  1. to spread cinders on a surface, as a road or sidewalk: My neighbor began cindering as soon as the first snowflake fell.

Origin of cinder

before 900; Middle English synder, Old English sinder slag; cognate with German Sinter, Old Norse sindr; c- (for s-) < French cendre ashes
Related formscin·der·y, cin·der·ous, adjectivecin·der·like, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for cinderous

Historical Examples of cinderous

  • A worthy companion portrait to that of cinderous Mr. Toodles, the stoker, familiar to the readers of Dombey.

British Dictionary definitions for cinderous


  1. a piece of incombustible material left after the combustion of coal, coke, etc; clinker
  2. a piece of charred material that burns without flames; ember
  3. Also called: sinter any solid waste from smelting or refining
  4. (plural) fragments of volcanic lava; scoriae
  1. (tr) rare to burn to cinders
Derived Formscindery, adjective

Word Origin for cinder

Old English sinder; related to Old Norse sindr, Old High German sintar, Old Slavonic sedra stalactite
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for cinderous



Old English sinder "dross of iron, slag," from Proto-Germanic *sendra- "slag" (cf. Old Saxon sinder "slag, dross," Old Norse sindr, Middle Low German and Middle Dutch sinder, Dutch sintel, Old High German sintar, German Sinter), from PIE root *sendhro- "coagulating fluid" (cf. Old Church Slavonic sedra "cinder").

Initial s- changed to c- under influence of unrelated French cendre "ashes," from Latin cinerem (nominative cinis) "ashes," from or related to Greek konis "dust" (see incinerate). The French word also apparently shifted the sense of the English one to "small piece of burnt coal" (16c.). Volcanic cinder cone is recorded from 1849.

Online Etymology Dictionary, © 2010 Douglas Harper

Idioms and Phrases with cinderous


see burned to a cinder.

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.