a descent as through liquid (especially through water)
"they still talk about the sinking of the Titanic"
a slow fall or decline (as for lack of strength)
"after several hours of sinking an unexpected rally rescued the market"
"he could not control the sinking of his legs"
a feeling caused by uneasiness or apprehension
"with a sinking heart"
"a sinking feeling in the pit of my stomach"
The process by which something sinks.
"The sinking of the old lighthouse was so sudden that no one had time to evacuate before it vanished beneath the waves."
present participle of sink
"The boat began sinking rapidly after taking on water during the storm."