IDEAL — Definition of IDEAL
noun
1
A perfect standard of beauty, intellect etc., or a standard of excellence to aim at.
2
A subring closed under multiplication by its containing ring.
3
(lattice theory) A non-empty lower set (of a partially ordered set) which is closed under binary suprema (a.k.a. joins).
4
A collection of sets, considered small or negligible, such that every subset of each member and the union of any two members are also members of the collection.
adjective
1
Optimal; being the best possibility.
2
Perfect, flawless, having no defects.
3
Pertaining to ideas, or to a given idea.
4
Existing only in the mind; conceptual, imaginary.
📚 Source: en.wiktionary.org/wiki/ideal
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