1

defective

adjective de·fec·tive \ di-ˈfek-tiv \
Updated on: 24 Nov 2017

Definition of defective

1 a : imperfect in form or function : faulty
  • replaced a defective light switch
b : falling below the norm in structure or in mental or physical function
  • defective eyesight
  • a defective gene
2 grammar : lacking one or more of the usual forms of inflection (see inflection 3)
  • Must is a defective verb.

defectively

adverb

defectiveness

noun

Examples of defective in a Sentence

  1. This computer is defective. I want my money back.

  2. The disease is caused by a defective gene.

Recent Examples of defective from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'defective.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of defective


2

defective

noun

Definition of defective

: a person who is subnormal physically or mentally

Origin and Etymology of defective


DEFECTIVE Defined for English Language Learners

defective

adjective

Definition of defective for English Language Learners

  • : having a problem or fault that prevents something from working correctly : having a defect or flaw


DEFECTIVE Defined for Kids

defective

adjective de·fec·tive \ di-ˈfek-tiv \

Definition of defective for Students

: having a defect or flaw
  • The car's brakes were defective.

Medical Dictionary

1

defective

adjective de·fec·tive \ di-ˈfek-tiv \

medical Definition of defective

: falling below the norm in structure or in mental or physical function
  • defective eyesight

defectiveness

play \-nəs\ noun

2

defective

noun

medical Definition of defective

: one that is subnormal physically or mentally


Seen and Heard

What made you want to look up defective? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

sticky or viscid

Get Word of the Day daily email!

Test Your Vocabulary

Find the Cousins

  • a-large-tree-with-many-branches
  • Which pair shares a common word ancestor?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Citation

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!