(1) To extract by boiling; to boil down in a watery fluid; to make an infusion of.
(2) To make concentrated; to strengthen.
(3) To prepare through the heat of the stomach for assimilation; to digest
Word origin: From Old French décoction or Latin decoctio (decoct-, past participle stem of decoquere ‘boil down’, from de + coquere ‘cook’).
Related forms: decoction (noun).