Ungrammatical

adj

adj ·Rare ·Advanced level

Definitions

Adjective
  1. 1
    In violation of one or more of the rules and conventions of a language as defined by the grammar, resulting in unacceptable or incorrect usage.

    "My Greek is not the tongue of Homer or Aeschylus but a sloppy ungrammatical sabir lacking Attic salt and tending to a saccharinity which sets my teeth on edge."

Adjective
  1. 1
    not grammatical; not conforming to the rules of grammar or accepted usage wordnet

Synonyms

All synonyms
agrammaticalagrammaticalill formedill-formedincorrectungrammatic

Example

More examples

"These ungrammatical sentences resulted from the application of the additional rule F."

Etymology

From un- + grammatical.

Related phrases

in violation of one or more of rules and conventions of language as defined by grammar resulting in unacceptable or incorrect usage

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