marinate /ˈmæɹɪneɪt/verb 5adjective 1forms 3phrases 1 verb5 •To allow a sauce or flavoring mixture to absorb into something; to steep or soak something in a marinade to flavor or prepare it for cooking.You'll get a better flavour from the chicken if you marinate it first.After the chicken has marinated for two hours, discard the remaining marinade. •To allow a substance to be absobed into the hair or scalp.oblucy: "vinegar... to marinate the scalp... oil... to lubricate the scalp..." — 1992 •Of a substance, to absorb into the hair or scalp.a rejuvenating oil you use to saturate your hair and let it marinate from 15 minutes to 2 hours — 2003 •Of ideas or feelings, to mentally develop over time. •(informal, figurative) Especially of a haircut, to settle in and for one to get used to it.It's not a bad haircut! You just got to let it marinate! adjective1 •(rare) Marinated. formsmarinated · marinating · marinates Phrases with marinate marinate onTo consider thoroughly; to ponder for a while.