Congeal/kənˈdʒiːl/ Definition 1 of 2Pro Tip 1/3Physical change Used when something physically thickens or hardens, especially when cooled. When the jelly cools down, it will congeal into a firm shape. Pro Tip 2/3Gradual process The action of congealing happens over time, not instantly. As the night grew colder, the stew in the pot slowly began to congeal. Pro Tip 3/3Visual imagery The word often evokes a clear visual image of a substance's texture changing. You could see the fat congeal at the top of the soup as it cooled.