طفافة doesn't appear in Hans Wehr's Modern Standard Arabic dictionary, but Lane's Arabic-English Lexicon has an entry for it. Select the entry below for the full classical Arabic definition.

• طُفَافَةٌ

  طُفَافَةٌ ذ The quantity that is above the measure; (S, O, Msb, K;) as also (S) or : (O, K:) or the quantity that falls short of filling the vessel, (IDrd, O, K,) of beverage or wine, &c. (IDrd, O. [See also طَفَاف.]) An…

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