طيب doesn't appear in Hans Wehr's Modern Standard Arabic dictionary, but Lane's Arabic-English Lexicon has 3 entries for it, distinguished by diacritics. Select one below for the full classical Arabic definition.

• طَابَ Form 1

  1 طَابَ ذ , aor. يَطِيبُ, (S, Msb, K, &c.,) inf. n. طِيبٌ (S [but there mentioned app. as a subst.], O, Mgh, Msb, K) and طِيبَةٌ (S, O, K) and طَابٌ (K) and طُوبَى [q. v. infrà] (Ksh and Bd in xiii. 28) and تَطْيَابٌ, (S…

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• طِيبٌ

  طِيبٌ ذ an inf. n. of طَابَ. (O, Mgh, * Msb, K.) [Used as a simple subst., Goodness, pleasantness, &c.] You say, مَا بِهِ مِنَ الطِّيبِ [There is not in him aught of goodness, &c.]: you should not say, من الطِّيبَةِ. (S,…

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• طَيِّبٌ

  طَيِّبٌ ذ (S, M, Mgh, O, Msb, K) and , (S, M, O, K,) the latter originally طَائِبٌ and deprived of its medial radical letter, or of the measure فَعَلٌ, (M, TA,) Contr. of خَبِيثٌ, (S, Mgh, O,) in two senses: (Mgh:) [i. e…

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