has little chance of being the case or coming about; "an unlikely story"; "an unlikely candidate for reelection"; "a butcher is unlikely to preach vegetarianism"
not acceptable; not welcome; "a word unacceptable in polite society"; "an unacceptable violation of personal freedom"
not adequate to give satisfaction; "the coach told his players that defeat was unacceptable"
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'"