frontier /fruntˈ or fronˈtēr, -tyər or -tērˈ/

1. The border of a country
2. The border of settled country, esp in the USA, the advancing limit of the West pioneered in the 19c
3. An outwork (fortification; Shakespeare)
4. (in pl) the extreme limit (of knowledge and attainment) in a particular discipline or line of inquiry

1. Belonging to a frontier
2. Bordering

To border

frontˈiersman or frontˈierswoman (or /-tērzˈ/) noun

A dweller on a frontier

• plussing
• plus-size
• plus strain
• plus strains
• plus twos
• pluteal
• pluteus
• pluteuses
• pluto-
• Pluto
• plutocracies
• plutocracy
• plutocrat
• plutocratic
• plutocrats
• pluto-democracy
• plutoid
• plutolatries
• plutolatry
• plutologies
• plutologist
• plutologists
• plutology
• pluton
• Plutonian