magnolia UK /ˌmæɡˈnəʊ.li.ə/US /ˌmæɡˈnoʊ.li.ə/noun 4adjective 1forms 1 noun4 •A tree or shrub in any species of the genus Magnolia, many with large flowers and simple leaves.There are clusters of magnolias that are so tall and green and glossy, they are impossible to climb, and the air around them always smells like peaches. — 2011 •The flower of a magnolia tree. •A creamy white colour, like that of some magnolia flowers. •A native or resident of the American state of Mississippi. adjective1 •Of a creamy white colour, like that of some magnolia flowers. formsmagnolias