| source : web1913 | Obstreperous \Ob*strep"er*ous\, a. [L. obstreperus, from obstrepere to make a noise at; ob (see {Ob-}) + strepere to make a noise.] Attended by, or making, a loud and tumultuous noise; clamorous; noisy; vociferous. ``The obstreperous city.'' --Wordsworth. ``Obstreperous approbation.'' --Addison. Beating the air with their obstreperous beaks. --B. Jonson. -- {Ob*strep"er*ous*ly}, adv. -- {Ob*strep"er*ous*ness}, n. | source : wn | obstreperous adj 1: noisily and stubbornly defiant; "obstreperous boys" 2: boisterously and noisily aggressive; "kept up an obstreperous clamor"