1. presoak - Noun
2. presoak - Verb
(transitive) To soak in advance.
to presoak lentils before cooking
(transitive) To soak laundry in cold water prior to washing, sometimes with the addition of a biological or other preparation.
An initial soak.
A preparation used in such a soak.
A cycle of a washing machine during which this occurs.
Source: en.wiktionary.org