Definition

1. Noun:

   • A person of subnormal intelligence: An "imbecile" is a person with significantly below-average intellectual ability or cognitive function. Historically, this term was used in medical and psychological classifications to describe a specific level of intellectual disability.
   • A foolish or stupid person: In informal, often offensive usage, "imbecile" is used as a strong insult to call someone extremely foolish or lacking in common sense.

2. Adjective:

   • Having a mental age of three to seven years: This is a dated and now offensive clinical description indicating a severe level of intellectual impairment.
   • Utterly foolish or stupid: Used to describe actions, ideas, or behavior that are exceptionally senseless.

Examples of Usage

• Noun:

  • He was dismissed as an imbecile who couldn't understand the simplest instructions.
  • In the outdated classification system, an imbecile was considered to have moderate to severe intellectual disability.

• Adjective:

  • The court deemed the defendant imbecile and unfit to stand trial. (dated/clinical)
  • That was an imbecile mistake to make. (informal, offensive)

Advanced Usage

• Historical/Legal Context: The term was once a formal diagnostic category but is now considered highly pejorative and obsolete in medical and legal contexts. Modern terms like "intellectual disability" or specific diagnostic levels are used instead.
  • The 19th-century asylum records classified many patients as idiots, imbeciles, or morons.

Variants and Related Words

• Imbecility (noun): The state of being an imbecile; profound foolishness or stupidity.
  • The sheer imbecility of the plan was apparent to everyone.

Synonyms

• Noun (for foolish person): Fool, idiot, simpleton, moron (all can be similarly offensive).
• Adjective (for foolish): Idiotic, asinine, moronic, senseless.

Important Note on Usage

• Extreme Caution Required: The word "imbecile" is now almost exclusively used as a severe insult. Its historical clinical meaning is obsolete and offensive. It is considered derogatory and unacceptable when referring to individuals with intellectual or developmental disabilities. Use with great care, understanding its highly offensive nature in contemporary language.

Adjective

1. having a mental age of three to seven years

Noun

1. a person of subnormal intelligence