sat ‧ u ‧ ra ‧ tion /ˌsætʃəˈreɪʃ ə n/ BrE AmE noun [uncountable]
1 . when an event or person is given so much attention by newspapers, television etc that everyone has heard about it:
The trial was given saturation coverage by the press.
saturation advertising
2 . saturation bombing a military attack in which a whole area is bombed
3 . technical the degree to which something has been mixed into something else:
Keep saturation below 80%.
4 . when something is made completely wet