What is the meaning of Umu?

An earth oven used in New Zealand, Samoa, and other Pacific islands, consisting of a hole dug in the ground and lined with heated stones.

genitive/dative/locative singular of um

Rōmaji transcription of うむ

oven

oven

we

titan triggerfish (Balistoides viridescens)

oven

cooking house

Source: wiktionary.org