رنآء doesn't appear in Hans Wehr's Modern Standard Arabic dictionary, but Lane's Arabic-English Lexicon has 4 entries for it, distinguished by diacritics. Select one below for the full classical Arabic definition.

• رُنَّآءٌ

  رُنَّآءٌ ذ , like رُمَّانٌ, with teshdeed, accord. to Th, i. q. طَرَبٌ: (TA:) or so رُنَآءٌ, without teshdeed, (M, TA,) accord. to A 'Obeyd: the latter is mentioned in its proper place [in art. رنو, q. v.]. (TA.)…

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• رَنَآءٌ

  رَنَآءٌ ذ , with fet-h, (T,) like سَحَابٌ, (TA,) i. q. جَمَالٌ [Beauty, goodliness, comeliness, &c.]: (T, K:) so says AZ. (T.)…

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• رُنَآءٌ

  رُنَآءٌ ذ , with damm, i. q. طَرَبٌ [app. as meaning A lively emotion of joy; mirth, joy, gladness, or delight]. (K. [See also رُنَّاءٌ, in art. رن: and see the last signification of 1 in the present art.]) -b2- Also A …

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• رَنَّآءٌ

  رَجُلٌ رَنَّآءٌ ذ A man who gazes, or looks continually, at women. (S. [See also رَنُوٌّ.])…

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