Definition of “saturate” - Learner’s Dictionary

saturate

verb [ T ] uk us /ˈsætʃəreɪt/

to make something completely wet:

Heavy rain had saturated the playing field.

to put as much of a substance that dissolves into a solution as is possible

saturation uk us /ˌsætʃərˈeɪʃən/ noun [ U ]

(Definition of “saturate” from the Cambridge Learner's Dictionary © Cambridge University Press)