A natural frontier or boundary line. Obsolete.
| 单词 | θ101425 | 
| 释义 | the world > space > relative position > condition of being external > edge, border, or margin > boundary > 			[noun]		 > land-boundary > of a region or territory > natural (1)		 barricado1644 A natural frontier or boundary line. Obsolete. | 
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