Last Updated
：2025/11/19
keystone
IPA(Pronunciation)
Sense（5）
（ plural ）
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(architecture) The top stone of an arch. / Something on which other things depend for support. / A native or resident of the American state of Pennsylvania.
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keystone
The mason carefully fitted the keystone into the arch, knowing it would lock the other stones in place.
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The mason carefully fitted the keystone into the arch, knowing it would lock the other stones in place.
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