n.
1.a particular geographical region of indefinite boundary (usually serving some special purpose or distinguished by its people or culture or geography)
2.a particular environment or walk of life
3.a subject of study
4.a part of a structure having some specific characteristic or function
5.a part of an animal that has a special function or is supplied by a given artery or nerve
6.the extent of a 2-dimensional surface enclosed within a boundary
Idiom of the Day
a credit to (someone or something)
to be invaluable or beneficial to someone or something
The doctor was a credit to the hospital where he worked.
