A specific sphere or domain of academic research, thought, or social activity; a particular area of expertise or branch of study.

region; zone; district; area within a certain boundary

the entire area drained by a river system including its main stream and all its tributaries; drainage area; valley

a large area, district, or region; land boundaries or a specific territory

sea area; maritime space; territorial waters

(computing) domain name; the symbol-based address used to identify and search for a person, business, or organization on the internet

a defined area or body of water (such as a river, lake, or sea), including the space from the surface to the bottom; specifically used to refer to waters for navigation, mooring, or jurisdiction

regional; local; having regional characteristics

The historical name for regions west of the Yumen and Yangguan passes; in a narrow sense referring to Xinjiang, and in a broad sense including Central and Western Asia, North Africa, and parts of Europe

A system that connects multiple computers and communication devices within a small fixed area to share data and software; often abbreviated as LAN. Also called [[局域网络|局域網絡|ju2 yu4 wang3 luo4]] or [[区域网路|區域網路|qu1 yu4 wang3 lu4]] in Taiwan.

foreign country; a land outside of one's own nation

The range between the highest and lowest notes that a voice or instrument can produce; vocal or instrumental register

a designated or controlled region of the atmosphere

regionalism; localism; the quality of being specific to a particular territory or geographical area

territory; domain; the geographical extent of a country or region

a computer communication network established for use within a single city; metropolitan area network

(literary) within the territory or borders of a nation

(literary) outside the borders of a country or region; foreign lands

A computer communication network formed by connecting several local area networks across a large geographical area; also referred to as a WAN.

(literary) foreign lands; areas outside of China

the set of all values that a function can produce; image; codomain

(math) a set containing all points within a certain distance of a given point in a topological space

(math.) subfield

(math) The set of all possible input values for which a function is defined; the domain of definition.

a certain range, area, or territory; the limits or scope of something

administrative area; administrative district; a region or division established for governmental administration

a set of numbers where basic operations like addition and multiplication can be performed; specifically a subfield of the complex numbers in mathematics

(literary) a boundary or the scope of something

the field of complex numbers in mathematics, usually denoted by the symbol C

To not draw boundaries or make distinctions between people or nations; regardless of national or regional differences

(math) closed domain or algebraically closed field, such as the [[复数域|複數域|fu4 shu4 yu4]]

(math.) codomain of a function

The sea area beyond a country's territorial waters over which it has special rights regarding exploration, mining, and fishing; typically extending 200 nautical miles from the coast

The region in West Asia between the Tigris and Euphrates rivers; home to the ancient civilization of Mesopotamia.

Incheon Metropolitan City in [[京畿道|京畿道|jing1 ji1 dao4]], South Korea

a finite-degree field extension of the field of rational numbers in mathematics

Famous scholar and writer (1618–1654) of the late Ming and early Qing dynasties, noted as one of the Three Great Prose Masters of the Early Qing; his romance with the courtesan Li Xiangjun is the subject of the play [[桃花扇|桃花扇|tao2 hua1 shan4]]

(literary) the boundaries of a burial ground; a cemetery or grave site

Gwangju Metropolitan City, South Korea; the capital of South Jeolla Province [[全罗南道|全羅南道|quan2 luo2 nan2 dao4]]

the entire area; the entire domain; domain-wide or global in scope; macrocosm

The whole of the sky or celestial sphere; all-sky

(computing) the area of a program where a variable is accessible throughout the entire code

telephone area code

region code, specifically for DVDs or other digital media; area code

the economy of a specific region or area; the study of regional economics

local area network; LAN

(Taiwan) local area network (LAN); a computer network that links devices within a limited area such as a residence, school, or office building

A basketball defensive strategy where players guard specific areas of the court rather than specific opponents; players shift their positions according to the movement of the ball.

South Asian Association for Regional Cooperation; SAARC