Definition:
Female of domestic cattle (of the Bos taurus Bubalus bubalis and Beefalo) aged 2 years and over and younger that has already had young and which due to its breed or particular traits is being maintained solely or to a significant degree to produce milk designated for human consumption or for the production of dairy products. Also includes dairy cows that after the fattening period will be slaughtered.

Source:

• Regulation (EC) No 1165/2008 of the European Parliament and of the Council of 19 November 2008 concerning livestock and meat statistics and repealing Council Directives 93/23/EEC, 93/24/EEC and 93/25/EEC
  Place of publication: (Dz. Urz. UE L 321 z 01.12.2008, str. 1, z późn. zm.)