deduct

American Heritage® Dictionary of the English Language, Fourth Edition

1. v. To take away (a quantity) from another; subtract.
2. v. To derive by deduction; deduce.
3. v. To take away a desirable part: Poor plumbing deducts from the value of the house.

Century Dictionary and Cyclopedia

1. To lead forth or away; deduce; conduct.
2. To trace out; set forth.
3. To bring down; reduce.
4. To take away, separate, or remove in numbering, estimating, or calculating; subtract, as a counterbalancing item or particular: as, to deduct losses from the total receipts; from the amount of profits deduct the freight-charges.
5. Synonyms Deduct, Subtract. These words cannot properly be used interchangeably. Deduct is to lead away, set aside, in a general or distributive sense; subtract, to draw off, remove, in a literal or collective sense. In settling a mercantile account, certain items, as charges, losses, etc., are deducted by being added together and their total subtracted from the grand total of the transaction. From a parcel of goods of known value or number articles are subtracted or literally taken away as required; the value or number of the remainder at any time may be ascertained by deducting the value or number of those taken from the original package; and this again is effected by subtracting the figures representing the smaller amount from those representing the larger.

Wiktionary

1. v. To take one thing from another; remove from; make smaller by some amount.

GNU Webster's 1913

1. v. obsolete To lead forth or out.
2. v. To take away, separate, or remove, in numbering, estimating, or calculating; to subtract; -- often with from or out of.
3. v. obsolete To reduce; to diminish.

WordNet 3.0

1. v. make a subtraction
2. v. retain and refrain from disbursing; of payments
3. v. reason by deduction; establish by deduction