canopy

Short definition from Wiktionary

Noun

1. 1
   A high cover providing shelter, such as a cloth supported above an object, particularly over a bed.
2. 2
   Any overhanging or projecting roof structure, typically over entrances or doors.
3. 3
   The zone of the highest foliage and branches of a forest.
4. 4
   In an airplane, the transparent cockpit cover.
5. 5
   In a parachute, the cloth that fills with air and thus limits the falling speed.

Verb

1. 1
   To cover with or as if with a canopy.
2. 2
   To go through the canopy of a forest on a zipline.