not adequate to give satisfaction: "the coach told his players that defeat was unacceptable"
not acceptable; not welcome
- "an unacceptable violation of personal freedom"
- "a word unacceptable in polite society"
(linguistics) not conforming to standard 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'"