To make (a quantity) smaller.
To cause to become greater in size, amount, degree, etc.; add to; augment
To take away a desirable part:
(Music) To reduce (a perfect or minor interval) by a semitone.
To lend money upon, deducting the discount or allowance for interest; as, the banks discount notes and bills of exchange.
The definition of add means to join or bring together for the purpose of increasing in number or importance or to change the effect.
(Intransitive) To decrease in intensity or force; to subside. [First attested from around (1150 to 1350).]
To give back (part of an amount paid)
To refrain from giving or granting:
Find another word for subtract. In this page you can discover 22 synonyms, antonyms, idiomatic expressions, and related words for subtract, like: take away, knock off, decrease, remove, take, increase, take off, deduct, diminish, discount and minus.