\ˈkrəst \

Definition of crust 

1a : the hardened exterior or surface part of bread

b : a piece of this or of bread grown dry or hard

2a : the pastry shell of a pie : piecrust

b : the bready layer that forms the foundation of a pizza

3 : a hard or brittle external coat or covering: such as

a : a hard surface layer (as of soil or snow)

b : the outer part of a planet, moon, or asteroid composed essentially of crystalline rocks

c : a deposit built up on the interior surface of a wine bottle during long aging

d : an encrusting deposit (as of the eye) of dried secretions or exudate also : scab

4 : gall, nerve

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Other Words from crust

crust verb
crustal \ˈkrə-​stᵊl \ adjective
crustless \ˈkrəs(t)-​ləs \ adjective

Examples of crust in a Sentence

Her children prefer to eat their sandwiches with the crust cut off. a pie with flaky crust He likes pizza with thin crust.
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Recent Examples on the Web

There’s evidence that Europa might harbor a giant liquid-water ocean underneath its icy crust. Loren Grush, The Verge, "NASA’s Europa lander may be in jeopardy after the midterms — and some are fine with seeing it go," 10 Nov. 2018 This discovery is a big deal because cratonic roots make up a significant fraction of our planet’s crust. Avery Thompson, Popular Mechanics, "Scientists Find 'Quadrillions' of Tons of Diamonds Beneath Earth's Surface," 16 July 2018 Most were agreeable with their thin, crispy crusts buoying a variety of flavors. Anna Caplan, star-telegram, "The pizza version of a churrascaria exists — so wear your stretchy pants," 11 July 2018 The smoked mozzarella on his signature Tamaki pie is a revelation, but no order is complete without a marinara pizza, because any cheese is ultimately a distraction from the towering achievement of his crust. Stan Parish, WSJ, "‘Go Beyond Sushi’: Tokyo’s Culinary Gems," 19 June 2018 Visitors are permitted to bring their own gluten-free crust to use with Stoney Acres' toppings for a reduced fee. Chelsey Lewis, Milwaukee Journal Sentinel, "4 dining destinations in Wisconsin worth a road trip," 16 May 2018 And people also really like our gluten-free cauliflower pizza crust. Vickie Snow Jurkowski, Daily Southtown, "Trail's Edge Brewing Company offers full menu, lots of craft beer options in downtown Frankfort," 16 May 2018 Without plate tectonics turning over its crust, Mars’s interior has probably remained largely the same since its formation, Dr. Smrekar says. Eva Botkin-kowacki, The Christian Science Monitor, "How NASA's latest mission to Mars might dig up truths about Earth," 7 May 2018 If all goes as hoped, the resulting seismic x-rays of Mars will reveal the dimensions of its crust, mantle, and core and any layering within them. Paul Voosen, Science | AAAS, "By listening for quakes on Mars, NASA lander will probe Red Planet’s interior," 18 Apr. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'crust.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of crust

14th century, in the meaning defined at sense 1a

History and Etymology for crust

Middle English crouste, cruste, borrowed from Anglo-French & Latin; Anglo-French cruste, crouste, going back to Latin crusta "hard coating or surface layer, shell of an arthropod or crustacean, mineral flake, stone slab used in paneling," perhaps, if going back to *krus-to- "something crushed or pounded into a hard layer," from a zero-grade nominal derivative of Indo-European *kreu̯s- "beat, crush, pound," whence also Old English hruse "earth, ground," Old High German roso, rosa "crust, layer of ice" (going back to Germanic *hrusōn-) — more at anacrusis

Note: The hypothetical base *krus-to- is suggested by Michiel de Vaan, Etymological Dictionary of Latin and the Other Italic Languages (Leiden: Brill, 2008), p. 147, though the older handbooks (Walde-Hoffman, Ernout-Meillet) tend to support a connection with Greek krýos "icy cold, frost" and other derivatives, going back to a presumed homonymous *krus- (see cryo-). As de Vaan points out, however, Latin crusta does not mean "ice." The original sense of the Germanic noun *hrusōn- is not certain. Greek krýstallos "ice, rock crystal" is almost certainly unrelated (see crystal entry 1).

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Statistics for crust

Last Updated

10 Dec 2018

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Time Traveler for crust

The first known use of crust was in the 14th century

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English Language Learners Definition of crust

: the hard outer surface of bread

: the outside part of a pie

: the bread that is used to make a pizza


\ˈkrəst \

Kids Definition of crust

1 : the hardened outside surface of bread

2 : a hard dry piece of bread

3 : the pastry cover of a pie

4 : a hard outer covering or surface layer a crust of snow

5 : the outer part of the earth


\ˈkrəst \

Medical Definition of crust 

2 : an encrusting deposit of serum, cellular debris, and bacteria present over or about lesions in some skin diseases (as impetigo or eczema)

Other Words from crust

crust verb

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More from Merriam-Webster on crust

Rhyming Dictionary: Words that rhyme with crust

Thesaurus: All synonyms and antonyms for crust

Spanish Central: Translation of crust

Nglish: Translation of crust for Spanish Speakers

Britannica English: Translation of crust for Arabic Speakers

Comments on crust

What made you want to look up crust? Please tell us where you read or heard it (including the quote, if possible).


living or existing for a long time

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