Overburden meaning

ō'vər-bûr'dn
To burden with too much weight; overload.
verb
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To subject to an excessive burden or strain; overtax.
verb
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An excessive burden; an overload.
noun
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Material overlying a useful mineral deposit.
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Sedimentary rock covering older crystalline layers.
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To burden oppressively; weigh down.
verb
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Something that overburdens.
noun
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Soil, rock, etc. that is covering or overlying a useful deposit, as of ore.
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verb
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(geology) The rock and subsoil that lies above a mineral deposit such as a coal seam.
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(archaeology) A sterile stratum that lies above the stratum being investigated.
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A sterile stratum overlying a stratum bearing traces of the culture being studied.
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Origin of overburden

From over- +"Ž burden.