What is Canopy ?
Canopy is (noun) 1. a cloth cover or light roof over a small area such as a door, window or bed The porch is covered with a glass canopy. The Queen’s bedroom is furnished with a 17th century canopy bed. 2. the top parts of a group of trees when considered as a single mass The trees join to form a canopy over the terrace of the restaurant. (NOTE: The plural is canopies.)
source: Easier English, Student Dictionary Upper Intermediate Level