brain dead

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Explanation of "Brain Dead"

Definition: The term "brain dead" is an adjective that describes a serious medical condition where a person has lost all brain function, and there is no chance of recovery. This is usually confirmed by medical tests that show no brain activity.

Usage Instructions:

• You can use "brain dead" to describe someone who is in this medical state.
• It is also sometimes used informally to describe someone who is very tired or unable to think clearly.

Example:

1. Medical Context: "After the accident, the doctors confirmed that he was brain dead."
2. Informal Context: "After studying all night, I feel completely brain dead."

Advanced Usage:

In medical terms, "brain dead" is often considered irreversible, meaning that the person will not recover. It is also a legal definition in many places for determining the end of life.

Word Variants:

• Brain Death (noun): The state of being brain dead. Example: "The doctors declared him to be in brain death."
• Brain-dead (adjective): Can also be used informally to describe someone who is unable to think clearly or is exhausted. Example: "I’m feeling brain-dead after that long meeting."

Different Meanings:

1. Medical Meaning: Refers specifically to the absence of brain activity.
2. Informal Meaning: Used to describe someone who is mentally exhausted or not thinking clearly.

Synonyms:

• Comatose: In a state of prolonged unconsciousness.
• Unresponsive: Not reacting to stimuli.
• Lifeless: Without life or vitality.

Idioms:

• There are no specific idioms that use "brain dead," but you might hear phrases like "running on empty" to describe someone who is very tired.

Phrasal Verbs:

• There are no direct phrasal verbs associated with "brain dead," but you could use "wake up" in a context where someone is coming out of a state of being unresponsive.

Summary:

"Brain dead" is a serious medical term that indicates a complete loss of brain function. It can also be used in everyday language to express feeling exhausted or mentally drained.

Academic

Adjective

1. having irreversible loss of brain function as indicated by a persistent flat electroencephalogram
   • was declared brain dead