viola UK /viˈəʊ.lə/US /viˈoʊ.lə/noun 5exclamation 1/vaɪˈoʊlə/ noun 1forms 1 noun5 •A stringed instrument of the violin family, somewhat larger than a violin, played under the chin, and having a deeper tone.But those who attack violists shouldn't throw resin. Once the ergonomic viola catches on what instrument will be immune? — 1997 •A person who plays the viola. •An organ stop having a similar tone. •A 10-string steel-string acoustic guitar, used in Brazilian folk music. •A berimbau viola, the smallest member of the berimbau used in capoeira music. exclamation1 •(humorous) Misconstruction of voila.And viola, Eureka California! I have finished my greatest invention: the worst dog in the world! — 1988 viola UK /ˈviː.ələ/US /vaɪˈoʊlə/ noun1 •Any of several flowering plants, of the genus Viola, including the violets and pansies. formsviolas