What is the meaning of agreement?

noun

• The statement (oral or written) of an exchange of promises.
  • usage: "they had an agreement that they would not interfere in each other's business"; "there was an understanding between management and the workers"
  • synonyms: understanding
• Compatibility of observations.
  • usage: "there was no agreement between theory and measurement"; "the results of two tests were in correspondence"
  • synonyms: correspondence
• Harmony of people's opinions or actions or characters.
  • usage: "the two parties were in agreement"
  • synonyms: accord
• The thing arranged or agreed to.
  • usage: "they made arrangements to meet in Chicago"
  • synonyms: arrangement
• The determination of grammatical inflection on the basis of word relations.
  • synonyms: concord
• The verbal act of agreeing. .