frontier

Meaning

A new area of activity, knowledge, or development; the edge of knowledge or achievement.

A border between two countries; also a new area of knowledge or activity.

Example Sentences

Robotic surgery is exploring a new frontier in medicine.

The soldiers were stationed at the frontier to guard the border.

Example Expressions

frontier of knowledge

Synonyms

boundary, edge, border, limit, borderland

Entry 1

boundary, edge

Entry 2

border, boundary, edge, limit, borderland

Antonyms

interior, center

Entry 1

interior, center

Entry 2

center, interior

Collocations

frontier area, frontier guard, expand frontier, frontier town