Definition of treetop noun from the Oxford Advanced Learner's Dictionary

 

treetop

 noun
noun
BrE BrE//ˈtriːtɒp//
 
; NAmE NAmE//ˈtriːtɑːp//
 
[usually plural]
 
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the branches at the top of a tree birds nesting in the treetops
See the Oxford Advanced American Dictionary entry: treetop