Anaesthesia – Definition & Meaning

Anaesthesia is a medical term that is used to describe the loss of sensation or feeling in a person’s body. It is a state that is induced by the administration of drugs or other substances that are designed to block the transmission of nerve impulses. Anaesthesia is used in a wide range of medical procedures, from minor surgeries to major operations. In this article, we will explore the definition and meaning of anaesthesia, its origin, and its associations.


Anaesthesia is defined as the state of temporary loss of sensation or awareness that is induced by the administration of drugs or other substances. It is a state in which a person is unconscious and does not feel any pain or discomfort. There are different types of anaesthesia, including local anaesthesia, regional anaesthesia, and general anaesthesia.


The word anaesthesia comes from the Greek words “an” meaning without, and “aisthesis” meaning sensation. The term was first used in the mid-19th century by a Scottish physician named James Young Simpson, who was one of the pioneers of anaesthesia.

Meaning in different dictionaries

According to the Oxford English Dictionary, anaesthesia is defined as “the loss of sensation, especially of pain, in a part or the whole of the body, induced by the administration of a drug or other agent.” Merriam-Webster defines it as “loss of sensation with or without loss of consciousness.”


Anaesthesia is often associated with medical procedures such as surgery, dental work, and diagnostic tests. It is also used in pain management and palliative care. In addition, anaesthesia is associated with certain risks and complications, such as allergic reactions, respiratory problems, and cardiovascular events.


Some synonyms of anaesthesia include numbness, insensibility, unconsciousness, and sedation.


Some antonyms of anaesthesia include sensation, awareness, consciousness, and feeling.

The same root words

Some words that share the same root as anaesthesia include anaesthetic, anaesthetist, anaesthetize, and anaesthesiology.

Example Sentences

  1. The patient was given anaesthesia before the surgery to prevent any pain or discomfort.
  2. The dentist used a local anaesthetic to numb the patient’s mouth before the procedure.
  3. The anaesthetist monitored the patient’s vital signs throughout the surgery to ensure their safety.
  4. The patient woke up from the anaesthesia feeling groggy and disoriented.
  5. The doctor prescribed a painkiller to manage the patient’s discomfort after the procedure.
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