frontier /ˌfrʌnˈtiɚ/ Brit /ˈfrʌntɪə/ noun plural frontiers
/ˌfrʌnˈtiɚ/ Brit /ˈfrʌntɪə/
noun
plural frontiers
Learner's definition of FRONTIER
[count]
1
: a border between two countries边境;国界 2
: a distant area where few people live边疆;边远地区 3
: the limits of knowledge in a particular field(某领域知识的)前沿,尖端 —
usually plural通常用复数