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ideal
/aɪˈdiː.əl/
noun
A perfect standard of beauty, intellect etc., or a standard of excellence to aim at.
A subring closed under multiplication by its containing ring.
(lattice theory) A non-empty lower set (of a partially ordered set) which is closed under binary suprema (a.k.a. joins).
adjective
Optimal; being the best possibility.
Perfect, flawless, having no defects.
Pertaining to ideas, or to a given idea.
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