frontier
Translation
frontier, border, limit, edge
Examples
They lived on the American frontier.
They lived on the American frontier.
This is the new frontier of science.
This is the new frontier of science.
Grammar Patterns
((the)) frontier ((of sth.)) the limit of something This is the new frontier of science.
Similar Words
Synonyms: border, boundary, limit; Antonyms: interior, heartland
Etymology
From Old French 'frontiere' (borderland), from 'front' (front).
Memory Tips
Think of the 'front' line of a country or an area of knowledge.