/ ˈsaʊndli; NAmE / adverb
1.
if you sleep soundly , you sleep very well and very deeply
2.
in a way that is sensible or can be relied on :
a soundly based conclusion
3.
completely and thoroughly :
The team was soundly defeated.
4.
strongly; firmly :
These houses are soundly built.
5.
very well, but not in an excellent way :
He played soundly.
6.
( of physical punishment ) severely :
He was soundly beaten by his mother.