The difference between Crazy and Mentally ill

When used as adjectives, crazy means insane, whereas mentally ill means having a psychological disorder.


Crazy is also noun with the meaning: an insane or eccentric person.

Crazy is also adverb with the meaning: very, extremely.

check bellow for the other definitions of Crazy and Mentally ill

  1. Crazy as an adjective:

    Insane; lunatic; demented.

    Examples:

    "His ideas were both frightening and crazy."

  2. Crazy as an adjective:

    Out of control.

    Examples:

    "When she gets on the motorcycle she goes crazy."

  3. Crazy as an adjective:

    Overly excited or enthusiastic.

    Examples:

    "He went crazy when he won."

  4. Crazy as an adjective:

    In love; experiencing romantic feelings.

    Examples:

    "Why is she so crazy about him?"

  5. Crazy as an adjective (informal):

    Very unexpected; wildly surprising.

    Examples:

    "The game had a crazy ending."

  6. Crazy as an adjective:

    Characterized by weakness or feebleness; decrepit; broken; falling to decay; shaky; unsafe.

  1. Crazy as an adverb (slang):

    Very, extremely.

    Examples:

    "That trick was crazy good."

  1. Crazy as a noun:

    An insane or eccentric person; a crackpot.

  2. Crazy as a noun (slang, uncountable):

    Eccentric behaviour; lunacy.

  1. Mentally ill as an adjective:

    Having a psychological disorder.