Sentence:  South of Laurel Grove Cemetery , and below the junction of the Neversink and the <WSD>Delaware</WSD> , was the Tri-State Rock , from which Stevie could spy New Jersey and Pennsylvania , as well as New York , simply by spinning around on his heel . 
Meaning of the word marked with <WSD> tags:  a river that rises in the Catskills in southeastern New York and flows southward along the border of Pennsylvania with New York and New Jersey to northern Delaware where it empties into Delaware Bay