- To deduct is defined as to subtract or take away from a total.
If you have four cookies and someone takes two and you now only have two, this is an example of when someone deducts two cookies.
Origin: Middle English deducten ; from Classical Latin deductus, past participle of deducere: see deduce
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verb de·duct·ed, de·duct·ing, de·ducts verb, transitive
- To take away (a quantity) from another; subtract.
- To derive by deduction; deduce.
Origin: Middle English deducten, from Latin dēdūcere, dēduct-, to lead away or down; see deduce.