Meaning

noun an adjustment made for the weight of the packaging in order to determine the net weight of the goods

noun any of several weedy vetches grown for forage

noun weedy annual grass often occurs in grainfields and other cultivated land; seeds sometimes considered poisonous

originBorrowed from Middle French tare, from Italian tara, from Arabic طَرْحَة (ṭarḥa, “that which is thrown away”), a derivative of طَرَحَ (ṭaraḥa, “to throw (away)”).

Etymology from Wiktionary, CC BY-SA 3.0