Dictionary Definition :
Definition[1]
:
三因佛性(三佛性)之一。即指顯發照了眾生本具正性之觀智。金光明經玄義卷上(智顗著)謂,覺智(佛)非常非無常(性),理智相應,如人善知金藏,此智不可破壞,稱為了因佛性。〔北本大般涅槃經卷二十八、法華經文句卷九下、法華經玄義卷五下〕(參閱「三佛性」552)
Source
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佛光電子大辭典
Page
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p164
Definition[2]
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The second of the three Buddha-nature "causes", i.e. 正因佛性 is the 眞如 as direct cause of attaining the perfect Buddha-nature, associated with the 法身; 了因佛性 is the revealing or enlightening cause, associated with the Buddha-wisdom; 緣因佛性 is the environing cause, e.g. his goodness and merits which result in deliverance, or salvation.
Source
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A Dictionary of Chinese Buddhist Terms, William Edward Soothill and Lewis Hodous
Definition[3]
:
(術語)三因佛性之一。了達正性之覺智也。【參見: 三因佛性】
Source
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丁福保《佛學大辭典》
Definition[4]
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了謂照了。謂由前正因發此照了之智,智與理相應,故名了因佛性。
Source
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明,一如《三藏法數》字庫