Plain English Meaning
A pre-planned arrival path, named after the PAWLING fix it passes through, that pilots fly to bring their aircraft into the area of an airport in an organized way. 'TWO' just means it is the second version of this arrival that has been published.
Full Definition
A specific named Standard Terminal Arrival Route (STAR) that funnels arriving IFR traffic toward a destination airport via the PAWLING navigation fix, using a published sequence of fixes, altitudes, and routing. The 'TWO' indicates this is the second published revision of that arrival procedure.
Context Anchor
Seen on STAR charts, in IFR clearances, and during arrival before into the .