Definitions of negotiation on the Web:

• a discussion intended to produce an agreement; "the buyout negotiation lasted several days"; "they disagreed but kept an open dialogue"; "talks between Israelis and Palestinians"
• the activity or business of negotiating an agreement; coming to terms
  wordnet.princeton.edu/perl/webwn
• Negotiation is the process whereby interested parties resolve disputes, agree upon courses of action, bargain for individual or collective advantage, and/or attempt to craft outcomes which serve their mutual interests. It is usually regarded as a form of alternative dispute resolution.
  en.wikipedia.org/wiki/Negotiation
• This method is often used when selling real estate. Federal agencies may negotiate individual property sales as a way to sell the property. At other times, negotiation may be used in special circumstances. For example, GSA may negotiate a sale if, after advertising, the bid prices are not reasonable or if the specialized property is of interest only to a small group of buyers. ...
  www.pueblo.gsa.gov/cic_text/fed_prog/fedsales/glossary.htm
• The act of discussing an issue between two or more parties with competing interests with an aim of coming to an agreement.
  www.realestateagent-listings.com/terminology/terminology_n.htm
• Make an offer and we will attempt to negotiate a concluded contract between the parties.
  www.reinz.org.nz/reinz/public/buyers-sellers/terminology.cfm
• Discussion, written or otherwise, between two or more parties of different sides, the aim being to reach a common agreement.
  narains.com/glossary.htm
• The face to face process used by local unions and the employer to exchange their views on those matters involving personnel policies and practices or other matters affecting the working conditions of employees in the unit and reduced to a written binding agreement. Used also by contracting officers to reach agreement with potential contractors.
  www.business.gov/phases/launching/are_you_ready/glossary.html
• Discussion, written or otherwise, between two or more parties no different sides, the aim being to reach a common agreement. Non-confirming use: The use of a property, which does not conform to the allocation of the area for planning purposes. Such a property may have been built in conformity with the planning requirement at the time and a policy change ensued; more usually, the property was constructed before planning control was introduced. ...
  www.amchegoa.com/real_estate_goa/glossary1.htm
• the process of two or more people working together to resolve a problem.
  www.nationaltcc.org/tcc/
• Requests for proposals are sometimes used as a starting point for negotiations to establish a contract. RFPs generally include more than just price considerations. This method is especially applicable when dealing with a single source manufacturer.
  www.mmd.admin.state.mn.us/mn06008.htm
• a discussion with the aim of resolving a difference of opinion, or dispute, or to settle the terms of an agreement or transaction.
  www.powerhomebiz.com/Glossary/glossary-N.htm
• A dispute resolution process in which two parties settle their differences by themselves, without the use of a third-party.
  www.cfson-crcsf.ca/en/glossary/
• to confer with another so as to arrive at the settlement of some matter through conference, discussion, and compromise.
  www.inspection.gc.ca/english/corpaffr/publications/riscomm/riscomm_appe.shtml
• the use of direct argument and compromise by the parties to a dispute to arrive at a mutually satisfactory agreement.
  oregonstate.edu/instruct/anth370/gloss.html
• Contracting through the use of either competitive or other-than-competitive proposals and discussions. Any contract awarded without using sealed bidding procedures is a negotiated contract.
  strategicsourcing.navy.mil/reference_documents/defs.cfm
• A process of communication by which parties attempt to resolve a dispute between them.
  www.mediate.ca/shortglossary.htm
• The bargaining process between a buyer and a seller.
  www.horizonmedia.com/glossary/n.htm
• In dispute settlement, this is discussion designed to reach a mutual agreement.
  www.attorneykennugent.com/library/n.html
• The transaction of business aimed at reaching a meeting of minds among the parties; bargaining.
  www.bthurston.com/Real_Estate_Dictionary/page_644889.html
• In X.25 communications, the process by which two DTEs establish the packet size, packet window size, and throughput class to be used during a call procedure. Contrast with validation.
  www.ncsa.uiuc.edu/UserInfo/Resources/Hardware/IBMp690/IBM/usr/share/man/info/en_US/a_doc_lib/aixuser/glossary/N.htm
• A two-way process whereby the owner through the services rendered by the architect contests the offer made by the contractor to obtain more favorable terms that better match the proposed construction intent and the owner’s budget.
  www.ordesignandconstruction.com/glossary.htm
• Parties involved in the dispute discuss options for resolution without the help of a third party.
  www.commongroundinc.org/terminology.htm
• The art of achieving what you want from a transaction, leaving all other parties involved content that the relationship has gone well.
  www.mccombs.utexas.edu/faculty/Linda.Bailey/glossary.htm
• Communication, often between the party’s attorneys, for the purpose of reaching an understanding.
  www5.aaos.org/oko/vb/online_pubs/professional_liability/glossary.cfm
• A technological style dominant from 1600 to about 1880. Characterized by flexibility and compromise.
  www.udmercy.edu/faculty_pages/staudenmaier_sj/ethics/glossary.html
• The process of bargaining that precedes an agreement.
  www.peakagents.ca/glossary/n2.htm