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1. Oxford American Dictionary

   boundary

   • IPA[ˈbound(ə)rē]

   美式

   • n.
     a line that marks the limits of an area; a dividing line；a limit of a subject or sphere of activity

   • noun: boundary, plural noun: boundaries

2. • 釋義

   n.

   名詞

   • 1. a line that marks the limits of an area; a dividing line the eastern boundary of the wilderness the boundary between the US and Canada 同義詞 border, frontier, borderline, partition, dividing line, ... 更多bounding line, bounds, confines, limits, outer limits, extremities, margins, edges, fringes, border, periphery, perimeter, circumference, rim, circuit, literarymarge, bourn, skirt
   • ▪ a limit of a subject or sphere of activity a community without class or political boundaries 同義詞 dividing line, divide, division, borderline, demarcation line, ... 更多line of demarcation, cutoff point, threshold, limits, parameters, bounds, outer limits, confines, extremities, barriers, thresholds, ambit, compass