Plain English Meaning
It is the way wind flows around an area of high pressure. In the Northern Hemisphere the wind moves around it clockwise, and the air slowly sinks and spreads outward, which usually means calm, fair weather.
Full Definition
The flow of air around a high-pressure center. In the Northern Hemisphere this circulation is clockwise; in the Southern Hemisphere it is counterclockwise. Air moves outward from the high and gradually descends, producing generally clear and stable weather.
Context Anchor
Seen in weather and wind-pattern discussions when reading about how air moves around high-pressure systems.
Derivation
From Greek 'anti' meaning 'opposite' and 'kyklos' meaning '' or 'wheel.' Literally 'opposite of cyclonic.' Since cyclonic flow goes counterclockwise around a (in the Northern Hemisphere), anticyclonic flow goes the opposite way -- clockwise around a high.