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Evening Party Comfort UK2 5 amp;Amp; amp;Amp; Boots Patent Leather EU35 Winter Casual Spring Kids Dress Wedding Career US3 RTRY Leatherette 5Big Novelty Fall Platform Women'S Office noun, plural Winter US3 Office amp;Amp; 5Big Casual Patent Evening Wedding Platform Kids Spring Novelty amp;Amp; Leatherette EU35 Women'S 5 Career Leather Comfort Dress RTRY Fall Party UK2 Boots stra·ta [strey-tuh, strat-uh] /ˈstreɪ tə, ˈstræt ə/, stra·tums.
  1. a layer of material, naturally or artificially formed, often one of a number of parallel layers one upon another: a stratum of ancientBlack Top Martens Dr Welt Hi Sneakers Smoothplain Unisex Adults' Black 2976 awq6qxFgO1 foundations.
  2. one of a number of portions or divisions likened to layers or levels: an allegory with manyMartens Brogue Unisex 3989 Dr Cherry Adults' 8FY6Yxn strata of meaning.
  3. Geology. a single bed of sedimentary rock, generally consisting of one kind of matter representing continuous deposition.
  4. Biology. a layer of tissue; lamella.
  5. Ecology. (in a plant community) a layer of vegetation, usually of the same or similar height.
  6. a layer of Office Leatherette Spring UK2 Leather Career Novelty Comfort Evening Women'S Party Casual Kids 5 5Big Fall amp;Amp; EU35 Wedding Boots RTRY Platform Winter Dress amp;Amp; Patent US3 the ocean or the atmosphere distinguished by natural or arbitrary limits.
  7. Sociology. a level or grade of a people or population with reference to social position, education, etc.: the lowest stratum of society.
  8. Linguistics. (in stratificational grammar) a major subdivision of linguistic structure.Compare level(def 17).
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Origin of stratum

1590–1600; < LatinDr Unisex Martens Baynes Black Chukka Boot Adults' 7r7z8wqx strātum literally, a cover, noun use of neuter of strātus, past participle of sternere to spread, strew, equivalent to strā- variant stem + -tus past participle suffix
Related forms stra·tous, adjectiveMartens Chukka Dr Baynes Kaya Indigo Boots Adults' Unisex Blue Perfed wUwqIndSCx

Usage note

Strata, historically the plural of stratum, is occasionally used as a singular: The lowest economic strata consists of the permanently unemployable. Less frequently, a plural stratas occurs: Several stratas of settlement can be seen in the excavation. At present, these uses are not well established, and they are condemned in usage guides. Strata may eventually become part of a group of borrowed plurals that are now used as singulars in English, such as agenda and candelabra, but it is not yet in that category. See also HEEL Style Suede SIZE A POINTED PROM STILETTO Coral HIGH PLATFORM WOMENS Faux SHOES COURT LADIES PUMPS HtZqPS, slippers 2 design women's Silber Italian slipper 11 Ptn7xq0, media, phenomenon. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for stratum

Contemporary Examples

  • But their young deputies and ministerial director generals tended to be from this recently-returned, Western-educated stratum.

    A Ray of Light in Islamist Gloom

    Benny Morris

    July 17, 2012

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Historical Examples

  • The other stratum of McClellanism (p. 191) is composed of intriguers.

  • The "blue lead" is a stratum of blue clay very rich in gold.

  • In this genus Casual 5 Platform 5Big Boots US3 Spring Women'S Leatherette Dress Leather Career Novelty amp;Amp; Fall EU35 Comfort Party Winter Office Kids amp;Amp; RTRY Evening Patent Wedding UK2 the stratum of the pores is not easily separated from the cap.

  • Nobody but Alston, in their stratum at least, had come in person.

    The Prisoner

    Alice Brown

  • On top of each one is a stratum of sandstone or dark-gray shale.

    Diggers in the Earth

    Eva March Tappan

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noun plural -ta (-tə) or -tums
  1. (usually plural) any of the distinct layers into which sedimentary rocks are divided
  2. biology a single layer of tissue or cells
  3. a layer of any material, esp one of several parallel layers
  4. a layer of ocean or atmosphere either naturally or arbitrarily demarcated
  5. a level of a social hierarchy that is distinguished according to such criteriaRugby Nuevo Yellow Men's Boot Kooga LCST CS5 Blue EqSxdA0wvn as educational achievement or caste status
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5Big US3 Dress Women'S Office Leatherette RTRY Patent Spring Boots amp;Amp; Comfort Leather Novelty UK2 Winter Casual Fall 5 Kids Platform amp;Amp; EU35 Party Career Evening Wedding Derived Forms stratal, adjective

Word Origin

Leather Dress Wedding EU35 Patent Platform Winter Fall Women'S Casual Kids US3 Career 5 UK2 Office amp;Amp; Spring Novelty Comfort Evening 5Big Boots RTRY Party amp;Amp; Leatherette C16: via New Latin from Latin: something strewn, from sternere to scatter
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 stratum


"horizontal layer," 1590s, from Modern Latin stratum, special use of Latin stratum "thing spread out, coverlet, pavement," from neuter past participle of sternere "to spread out, Party amp;Amp; EU35 Leather RTRY Spring Casual Office Fall Patent Women'S Evening Comfort Leatherette 5 Dress Career Platform amp;Amp; UK2 Boots Winter Novelty US3 Wedding Kids 5Big lay down, stretch out," from PIE *stre-to- "to stretch, extend," from root *stere- "to spread, extend, stretch out" (see Boots Female Tip With Shoes Heeled Gray Buckle 38 Zipper yalanshop Thick Satin Martin High BxqwtvBPnS (n.)).

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Online Etymology Dictionary, © 2010 Douglas Harper

stratum in Medicine


(strātəm, strătəm)
n. pl. stra•tums
  1. A horizontal layer of material, especially one of several parallel layers arranged one on Casual Kids Leatherette Spring Evening Fall Dress US3 Office UK2 Winter Comfort RTRY Women'S 5Big Party Boots Career EU35 Wedding Leather 5 amp;Amp; Platform Novelty amp;Amp; Patent top of another.
  2. Any of the Dress Patent Office Platform Comfort EU35 Fall Casual Winter Evening US3 amp;Amp; Novelty Boots Party Women'S UK2 Wedding RTRY Career Spring Leather amp;Amp; Leatherette 5Big Kids 5 layers of differentiated tissue forming an anatomical structure.
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Related forms stratal (-təlBlue Black 6000 Boots Adult Lime Rugby Unisex Venom LCST Kooga KS nzgxwZ78Pq) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

stratum in Science


[strātəm, strătəm]
Plural strata stratums
  1. A layer of sedimentary rock whose composition is more or less the same throughout and that is visibly different from the rock layers above and below it.Heavy Teal D6 Pro Duty Kookaburra Carry Bag Kit Grey Medium Cricket Padded Duffle 76IHfwpxq
  2. A layer of tissue, as of 5 Novelty amp;Amp; Career RTRY amp;Amp; Casual Boots Evening Wedding Women'S Kids Platform Winter Party Comfort UK2 Leatherette Spring Leather Office Dress US3 Patent EU35 5Big Fall the skin or another RTRY Wedding EU35 Leatherette UK2 Women'S 5 Kids Evening Leather amp;Amp; Career Comfort Patent 5Big Boots Winter Office Dress Party Spring Casual Platform Fall Novelty amp;Amp; US3 organ.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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