Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- intransitive verb To remove (dead grass) from a lawn, usually to aerate the soil.
- intransitive verb To remove dead grass from a lawn.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- verb transitive To
abrade the surface of alawn orturf in order to remove dead grass.
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
Support

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Examples
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Keep your yard healthy - dethatch, use mulch, etc.
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Rake and dethatch an acre of lawn -- 5 hours of raking.
Wired Campus 2010
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If you see more than an inch of it, you need to dethatch, which can be done with a rake if it's a small job.
Yakima Herald-Republic Weekly News by Leah Beth Ward 2010
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Rake and dethatch an acre of lawn -- 5 hours of raking.
Wired Campus 2010
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Prep your lawn - At the beginning of the season, aerate and dethatch your lawn to relieve soil compaction and remove excess thatch.
Baltiblogs Ethan 2010
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Prep your lawn - At the beginning of the season, aerate and dethatch your lawn to relieve soil compaction and remove excess thatch.
Baltiblogs Ethan 2010
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Asher Waldfogel, a citizen adviser to Palo Alto on water use issues, said of that city's proposed restrictions: "With this ordinance, you're subject to water use audits, you're financially held responsible to mulch your lawn, to aerate, dethatch, prune and fertilize.
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Asher Waldfogel, a citizen adviser to Palo Alto on water use issues, said of that city's proposed restrictions: "With this ordinance, you're subject to water use audits, you're financially held responsible to mulch your lawn, to aerate, dethatch, prune and fertilize.
NYT > Home Page 2010
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Asher Waldfogel, a citizen adviser to Palo Alto on water use issues, said of that city's proposed restrictions: "With this ordinance, you're subject to water use audits, you're financially held responsible to mulch your lawn, to aerate, dethatch, prune and fertilize.
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Asher Waldfogel, a citizen adviser to Palo Alto on water use issues, said of that city's proposed restrictions: "With this ordinance, you're subject to water use audits, you're financially held responsible to mulch your lawn, to aerate, dethatch, prune and fertilize.
AroundTheCapitol.com 2010
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