Definitions
1.NounA herbaceous plant, Rubia tinctorum, native to Asia, cultivated for a red-purple dye (alizarin) obtained from the root.
2.NounThe root of the plant, used as a medicine or a dye.
3.NounA dye made from the plant.
4.NounA deep reddish colour, like that of the dye."madder: "
5.AdjectiveOf a deep reddish purple colour, like that of the dye.
6.VerbTo dye with madder.
7.Adjectivecomparative form of mad: more mad
8.NounObsolete form of mether.
9.VerbEye dialect spelling of matter.