Unacceptable

//ˌʌn.ækˈsɛp.tə.bl̩// adj, noun

adj, noun ·Moderate ·College level

Definitions

Noun
  1. 1
    Something that is not acceptable.

    "Second, the data collected using CASEMAP afford us the opportunity to conduct market segmentation analyses based on the similarity in the pattern of unacceptables and/or the benefits that consumers seek in the category."

Adjective
  1. 1
    Unsatisfactory; not acceptable.

    ""This shocking report proves once again that we urgently need a radical shake-up of hospital care," said Jeremy Hughes, chief executive of the Alzheimer's Society. "Given that people with dementia occupy a quarter of hospital beds and that many leave in worse health than when they were admitted, it is unacceptable that training in dementia care is not the norm.""

  2. 2
    Not conforming to accepted usage.
Adjective
  1. 1
    not acceptable; not welcome wordnet
  2. 2
    not adequate to give satisfaction wordnet
  3. 3
    not conforming to standard usage wordnet
  4. 4
    (used of persons or their behavior) not acceptable or reasonable wordnet

Synonyms

All synonyms
exceptionableintolerableunsatisfactorybadcensurablecrappo

Example

More examples

"It is highly regrettable that your request was considered to be unacceptable."

Etymology

From Middle English unacceptabylle, equivalent to un- + acceptable.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.