域

field / region / area / domain (taxonomy)

Tu (ethnic group) / surname Tu

earth / dust / clay / local / indigenous / crude opium / unsophisticated / one of the eight categories of ancient musical instruments 八音[ba1 yin1]

maybe / perhaps / might / possibly / or

area / region / district

regional

Incheon Metropolitan City in Gyeonggi Province 京畿道[Jing1 ji1 dao4], South Korea

algebraic number field (math.)

image (or range) of a function (math.)

Gwangju Metropolitan City, capital of South Jeolla Province 全羅南道|全罗南道[Quan2 luo2 nan2 dao4], South Korea

the entire area; the entire domain / global; domain-wide

Mesopotamia

(computing) global scope

(math.) neighborhood of a point

codomain of a function (math.)