Meaning of DEFECTIVE in English

DEFECTIVE

I. -ktiv, -tēv also ˈdēˌf- or -təv adjective

Etymology: Middle English, from Middle French defectif, from Old French, from Late Latin defectivus, from Latin defectus + -ivus -ive

1. obsolete : in error : at fault

2. : wanting in something essential : falling below an accepted standard in regularity and soundness of form or structure

a defective imprint

a defective pane of glass

or in adequacy of function

a defective mechanism

defective eyesight

: faulty , deficient , insufficient

defective method

3.

a. : lacking one or more of the usual forms of grammatical inflection

the defective verb quoth

b. of writing in a Semitic alphabet : lacking a vowel letter to indicate a vowel sound — compare scriptio defectiva

• de·fec·tive·ly -tə̇vlē, -li adverb

II. noun

( -s )

1. : a word that lacks one or more of the usual forms of grammatical inflection

the verb ought is a defective

2. : a person who is subnormal physically or mentally ; specifically : one with marked stigmata or physical defects

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.