Crust Definition

krŭst

crusted, crusting, crusts

noun

crusts

The hard, crisp outer part of bread.

Webster's New World

A piece of bread consisting mostly of the hard outer portion.

American Heritage

A piece of this.

Webster's New World

Any dry, hard piece of bread.

Webster's New World

The pastry shell of a pie.

Webster's New World

Synonyms:

verb

crusted, crusting, crusts

To cover with a crust.

Wiktionary

To cover or become covered with a crust.

Webster's New World

To form or harden into a crust.

Webster's New World

To harden into a crust.

American Heritage Medicine

Other Word Forms of Crust

Singular:

crust

Plural:

crusts

Latin crusta (“hard outer covering”) via Anglo-Norman and Old French cruste, from Proto-Indo-European *krus-to (“that which has been hardened”), from *kreus (“to form a crust, begin to freeze”), related to Old Norse hroðr (“scurf”), Old English hruse (“earth”), Old High German hrosa (“crust, ice”), Latvian kruwesis (“frozen mud”), Ancient Greek κρύος (kruos, “frost, icy cold”), κρύσταλλος (krustallos, “crystal, ice”), Avestan [script?] (xruzdra-, “hard”), Sanskrit क्रुड् (kruḍ, “thicken, make hard”)

From Wiktionary
Middle English cruste from Old French crouste from Latin crusta kreus- in Indo-European roots

From American Heritage Dictionary of the English Language, 5th Edition