Defective may refer to:: *

Defective matrix In linear algebra, a defective matrix is a square matrix that does not have a complete basis of eigenvectors, and is therefore not diagonalizable. In particular, an n \times n matrix is defective if and only if it does not have n linearly indepe ...

, in algebra *

Defective verb In linguistics, a defective verb is a verb that either lacks a conjugated form or entails incomplete conjugation, and thus cannot be conjugated for certain grammatical tenses, aspects, persons, genders, or moods that the majority of verbs or ...

, in linguistics *Defective, or ''haser'', in Hebrew orthography, a spelling variant that does not include

mater lectionis A ''mater lectionis'' ( , ; , ''matres lectionis'' ; original ) is any consonant letter that is used to indicate a vowel, primarily in the writing of Semitic languages such as Arabic, Hebrew and Syriac. The letters that do this in Hebrew are ...

*Something presenting an anomaly, such as a

product defect A product defect is any characteristic of a product which hinders its usability for the purpose for which it was designed and manufactured. Product defects arise most prominently in legal contexts regarding product safety, where the term is ap ...

, making it nonfunctional

See also