- noun1 (BrE) border between countriesADJECTIVE▪ common▪
Neither country would guarantee the integrity of their common frontier.▪ eastern, northern, etc.▪
There were very few border controls on the south-western frontier.▪ Franco-Spanish, French-Spanish, etc.VERB + FRONTIER▪ cross▪
The army crossed the frontier in the middle of the night.▪ reach▪ control, defend, guard▪
The rebels control the frontier and the surrounding area.FRONTIER + NOUN▪ controls, post▪ guard▪ zonePREPOSITION▪ across the frontier▪
The weapons were smuggled across the frontier.▪ along the frontier▪
an army grouping along the frontier▪ at the frontier▪
There was an army checkpoint at the frontier.▪ on the frontier▪
people living on the German frontier▪ over the frontier▪
They were forced to retreat back over the frontier.▪ frontier between▪
the frontier between India and Pakistan▪ frontier with▪
France's frontier with Germany2 the frontier the edge of land that is knownADJECTIVE▪ wild▪
America's wild frontier▪ westernVERB + FRONTIER▪ explore▪ tame▪ settleFRONTIER + NOUN▪ province, settlement, town▪ mentality, spirit3 border between what we know and do not knowADJECTIVE▪ final, last▪ new▪ next▪ technologicalVERB + FRONTIER▪ explore▪
Space is the final frontier for us to explore.▪ advance, expand, extend, open, push back▪
The scientists' work will push back the frontiers of physics.
Collocations dictionary. 2013.