Definition of milk cow in English:

milk cow

Pronunciation /ˈmɪlk ˌkaʊ/

noun

  • A cow bred or kept for milk; a cow yielding milk. Also figurative: a ready or reliable source of income or profit.

Origin

Late Middle English. From milk + cow. Compare West Frisian melkko, Middle Dutch melccoe (Dutch melkkoe), German regional (Low German) Melkkoh, German Milchkuh, Old Icelandic mjólkr-kýr, Old Swedish miolka ko (Swedish mjölk-ko).