n. 1 largeness. 2 size. 3 importance. 4 a degree of brightness of a star. b class of stars arranged according to this (of the third magnitude).: of the first magnitude very important. [Latin magnus great] magnolia immo’nanhai n. 1 tree with darkgreen foliage and waxy flowers. 2 creamypink colour. [Magnol, name of a botanist]