|Origin:||From an old past participle of sink|
1 [only before noun]
having fallen to the bottom of the sea, a lake, or a river:
the wrecks of sunken ships
cheeks or eyes that have fallen inwards, especially because of age or illness [= hollow]:
Her eyes looked dull and sunken.
3 [only before noun]
built or placed at a lower level than the surrounding floor or ground:
Steps led down to a sunken garden.
a sunken bath