A bakoven is a baking oven. People sometimes had a baking oven as a separate building, to prevent fire in the house. They are most commonly found in rural areas. You may come across the term in property records, such as notarial or court records.

Baking bread in a baking oven, about 1925. Credits: Lein de Nood, collection Erfgoedcentrum Zutphen, photo 0523_0002_A44 (public domain)