Ungrammatical
Origin
- + grammatical
Full definition of ungrammatical
Adjective
ungrammatical
- (linguistics) 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.
Usage notes
In formal linguistics, ungrammatical sentences are labelled using an asterisk (*):
*The subject of this sentence is.
This convention goes back at least as far as Leonard Bloomfield's Language (1933).