festoon /fɛsˈtuːn/noun 9verb 4forms 3 noun9 •An ornament such as a garland or chain which hangs loosely from two tacked spots. •A bas-relief, painting, or structural motif resembling such an ornament. •A raised cable with light globes attached. •A specific style of electric light bulb consisting of a cylindrical enclosure with two points of contact on either end providing power to the filament or diode. •Any of various papilionid butterflies of the genus Zerynthia. •A cloud on Jupiter that hangs out of its home belt or zone into an adjacent area forming a curved finger-like image or a complete loop back to its home belt or zone. •Two sets of rollers used to create a buffer of material on web handling equipment. •Any of a series of wrinkles on the backs of some ticks. •Texturing applied to a denture to simulate human tissue. verb4 •To decorate as if with ornaments, such as garlands or chains, which hang loosely from two tacked spots.The tree trunks and the creepers that festooned them lost themselves in a green dusk thirty feet above him, and all about was the undergrowth. — 1954 •To decorate or bedeck abundantly.He was bewildered by how the car was festooned with polka dots. •To make festoons. •To apply texturing to (a denture) to simulate human tissue. formsfestooned · festooning · festoons