festoon

US /fesˈtuːn/
UK /fesˈtuːn/
"festoon" picture
1.

decorate (a place) with ribbons, garlands, or other decorations

:
The hall was festooned with colorful balloons and streamers.
Trees along the street were festooned with lights for the holiday season.
1.

a chain or garland of flowers, leaves, or ribbons, hung in a curve as a decoration

:
The wedding arch was adorned with beautiful floral festoons.
Old streetlights were draped with elegant festoons of lights.