say it: MIT-uhn
mitten is a noun meaning "glove that encases the thumb separately and the other four fingers together". It carries one recorded sense.
glove that encases the thumb separately and the other four fingers together
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 mitten 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.