- (transitive) to take away or subtract (a number, quantity, part, etc)
WordReference Random House Learner's Dictionary of American English © 2017
- to take away from a total:How much of this expense can you deduct from your taxes?
- to take away, as from a sum or amount:Once you deduct your expenses, there is nothing left.
abate (usually fol. by from):The rocky soil deducts from the value of his property.
- Latin dēductus brought down, withdrawn, past participle of dēdūcere; see deduce
- late Middle English 1375–1425
- 1.See corresponding entry in Unabridged See subtract.