Meaning

• Being lower; being beneath something.

• Under anesthesia, especially general anesthesia; sedated.

  "Ensure the patient is sufficiently under."

Meaning

• In a way lower or less than.

• In a way inferior to.

• In an unconscious state.

  "It took the hypnotist several minutes to make his subject go under."

Meaning

• In or at a lower level than.

• As a subject of; subordinate to.

  "He served in World War II under General Omar Bradley."

• Less than.

• Below the surface of.

• In the face of; in response to (some attacking force).

  "to collapse under stress; to give in under interrogation"

• As, in the character of.

  "he writes books under the name John Smith"