surplus

from The American Heritage® Dictionary of the English Language, 5th Edition.

• adjective Being more than or in excess of what is needed or required: synonym: superfluous.
• noun An amount or quantity in excess of what is needed.
• noun Total assets minus the sum of all liabilities.
• noun Excess of a corporation's net assets over the face value of its capital stock.
• noun Excess of receipts over expenditures.

from The Century Dictionary.

• noun That which remains above what is used or needed; excess beyond what is prescribed or wanted; more than enough; overplus.
• noun In law, the residuum of an estate after the debts and legacies are paid.
• Being above what is required; in excess: as, surplus labor; surplus population.

from the GNU version of the Collaborative International Dictionary of English.

• adjective Being or constituting a surplus; more than sufficient
• noun That which remains when use or need is satisfied, or when a limit is reached; excess; overplus.
• noun Specifically, an amount in the public treasury at any time greater than is required for the ordinary purposes of the government.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun That which remains when use or need is satisfied, or when a limit is reached; excess; overplus.
• noun Specifically, an amount in the public treasury at any time greater than is required for the ordinary purposes of the government.
• noun law The remainder of a fund appropriated for a particular purpose.
• noun law assets left after liabilities and debts, including capital stock have been deducted.
• adjective Being or constituting a surplus; more than sufficient; as, surplus revenues; surplus population; surplus words.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• adjective more than is needed, desired, or required
• noun a quantity much larger than is needed