Wordnet 3.0
NOUN (1)
1.
noisy defiance;
The Collaborative International Dictionary of English v.0.48:
Obstreperous \Ob*strep"er*ous\, a. [L. obstreperus, from
obstrepere to make a noise at; ob (see Ob-) + strepere to
make a noise.]
1. Attended by, or making, a loud and tumultuous noise;
clamorous; noisy; vociferous. "The obstreperous city."
--Wordsworth. "Obstreperous approbation." --Addison.
[1913 Webster]
Beating the air with their obstreperous beaks. --B.
Jonson.
[1913 Webster]
2. Resistant to control; unruly.
[PJC] -- Ob*strep"er*ous*ly, adv. --
Ob*strep"er*ous*ness, n.
[1913 Webster]
WordNet (r) 3.0 (2006):
obstreperousness
n 1: noisy defiance