frontier
Translation
frontier, border, boundary
Examples
They lived on the American frontier.
They lived on the American frontier.
This discovery is the new frontier of science.
This discovery is the new frontier of science.
Grammar Patterns
the frontier of ((sth.)) the limit of knowledge in (sth.) This is the new frontier of science.
on the frontier at the border of settled land They lived on the American frontier.
Similar Words
Synonyms: border, boundary, edge, limit
Etymology
From Old French 'frontiere', meaning 'borderland', which comes from 'front'.
Memory Tips
Imagine the 'front' line of a country or an area of knowledge. This is the frontier.