noun

1. A person or thing considered to be defective.

adjective

1. Having one or more defects.

2. (grammar, of a lexeme, especially a verb) Lacking some forms; e.g., having only one tense or being usable only in the third person.

3. (Arabic grammar, of a verb) Having a root whose final consonant is weak (ي, و, or ء).

Synonyms: faulty