What is the meaning of unacceptable?

adjective

• Not adequate to give satisfaction.
  • usage: "the coach told his players that defeat was unacceptable"
• Not acceptable; not welcome.
  • usage: "a word unacceptable in polite society"; "an unacceptable violation of personal freedom"
• Used of persons or their behavior.
  • usage: "impossible behavior"; "insufferable insolence"
  • synonyms: impossible, insufferable, unsufferable
• Not conforming to standard usage.
  • usage: "the following use of `access' was judged unacceptable by a panel of linguists; `You can access your cash at any of 300 automatic tellers'"
  • synonyms: unaccepted