frontier

English Thesaurus

1. an undeveloped field of study; a topic inviting research and development (noun.cognition)

hypernym	:	bailiwick, discipline, field, field of study, study, subject, subject area, subject field,
definition	:	a branch of knowledge (noun.cognition)

2. an international boundary or the area (often fortified) immediately inside the boundary (noun.location)

hypernym	:	bound, boundary, bounds,
definition	:	the line or plane indicating the limit or extent of something (noun.location)

instance hyponym	:	triple frontier,
definition	:	the border area where Argentina and Brazil and Paraguay meet; an active South American center for contraband and drug trafficking and money laundering; a suspected locale for Islamic extremist groups (noun.location)

3. a wilderness at the edge of a settled area of a country (noun.location)

hypernym	:	wild, wilderness,
definition	:	a wild and uninhabited area left in its natural condition (noun.location)