say it: MAD-ur
madder is a noun and verb meaning "Eurasian herb having small yellow flowers and red roots formerly an important source of the dye alizarin". It carries 2 recorded senses.
Eurasian herb having small yellow flowers and red roots formerly an important source of the dye alizarin
color a moderate to strong red
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for madder come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.