Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Sediment deposited by flowing water, as in a riverbed, flood plain, or delta. Also called alluvion.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. soil, clay, silt or gravel deposited by flowing water, as it slows, in a river bed, delta, estuary or flood plain

from the GNU version of the Collaborative International Dictionary of English

  • n. Deposits of earth, sand, gravel, and other transported matter, made by rivers, floods, or other causes, upon land not permanently submerged beneath the waters of lakes or seas.

from The Century Dictionary and Cyclopedia

  • n. A deposit, usually of mingled sand and mud, resulting from the action of fluviatile currents: applied by geologists to the most recent sedimentary deposits, especially such as occur in the valleys of large rivers: opposed to diluvium (which see).

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. clay or silt or gravel carried by rushing streams and deposited where the stream slows down

Etymologies

Medieval Latin, flood, from neuter of Latin alluvius, alluvial, from alluere, to wash against; see alluvion.
(American Heritage® Dictionary of the English Language, Fourth Edition)

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  • Railroad telegraphers' shorthand for "are willing to agree". --US Railway Association, Standard Cipher Code, 1906.

    January 19, 2013