Definition of highfalutin adjective from the Oxford Advanced Learner's Dictionary

 

highfalutin

 adjective
adjective
BrE BrE//ˌhaɪfəˈluːtɪn//
 
; NAmE NAmE//ˌhaɪfəˈluːtɪn//
 
(informal)
 
jump to other results
trying to be serious or important, but in a way that often appears silly and unnecessary synonym pretentious highfalutin language Word Origin mid 19th cent. (originally US): perhaps from high + fluting (present participle of flute).
See the Oxford Advanced American Dictionary entry: highfalutin