Plain English Meaning
ELEV is short for elevation. It tells you how high something is above sea level, usually the airport itself.
Full Definition
On aeronautical charts and approach plates, ELEV is the standard abbreviation used to label the elevation of a feature above mean sea level (MSL), most commonly the airport elevation, which is the highest point on any of the airport's usable runways.
Context Anchor
Seen on approach charts, radar approach figures, airport information, and runway data where a height value is needed.