defective

The definition of defective is something or someone that is imperfect or that doesn't work properly.

(adjective)

A door that does not latch correctly is an example of something that would be described as defective.

See defective in Webster's New World College Dictionary

adjective

having a defect or defects; imperfect; faulty
Gram. lacking some of the usual forms of inflection: “ought” is a defective verb
having a physical or mental defect; subnormal

Origin: ME & OFr defectif < LL defectivus

noun

Related Forms:

See defective in American Heritage Dictionary 4

adjective

a. Having a defect; faulty: a defective appliance.
b. Marked by subnormal structure, function, intelligence, or behavior: defective speech.
Grammar Lacking one or more of the inflected forms normal for a particular category of word, as the verb may in English.

noun
Offensive

One who is physically or mentally deficient.

Related Forms: