[med-uh-vak] 
noun, verb, -vacked, -vack⋅ing.| 1. | a helicopter for evacuating the wounded from a battlefield. |
| 2. | an ambulance or other vehicle equipped for emergency transport of medical patients. |
| 3. | any of the trained personnel transporting or otherwise tending to the sick or wounded in a medevac. |
| 4. | to transport (sick or wounded persons) by medevac. |
| med·e·vac (měd'ĭ-vāk') n.
To transport (a patient) to a place where medical care is available. [med(ical) + evac(uation).] |
medevac med·e·vac (měd'ĭ-vāk')
n.
Air transport of persons to a place where they can receive medical or surgical care; medical evacuation.
A helicopter or other aircraft used for such transport.