<p><strong>Noun</strong></p><ul><li>a conception of something in its perfection</li><li>a standard of perfection or excellence</li><li>a person or thing conceived as embodying such a conception or conforming to such a standard, and taken as a model for imitation</li><li>an ultimate object or aim of endeavor, especially one of high or noble character</li><li>something that exists only in the imagination</li><li>a subring of a ring, any element of which when multiplied by any element of the ring results in an element of the subring</li></ul><p><strong>Adjective</strong></p><ul><li>conceived as constituting a standard of perfection or excellence</li><li>regarded as perfect of its kind</li><li>existing only in the imagination; not real or actual</li><li>advantageous; excellent; best</li><li>based upon an ideal or ideals</li><li>pertaining to a possible state of affairs considered as highly desirable</li><li>pertaining to or of the nature of idealism</li></ul>