a chemical substance produced in the body or in a plant that encourages growth or influences how the cells and tissues function; an artificial substance that has similar effects growth hormones a hormone imbalance Estrogen is a female sex hormone.
NAmE//hɔrˈmoʊnl//
adjective [usually before noun] the hormonal changes occurring during pregnancySee hormone in the Oxford Advanced Learner's DictionaryCheck pronunciation: hormone