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boundary line

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WordReference Random House Unabridged Dictionary of American English © 2026

bound′ary line′,

boundary (def. 1).
See partition line.

1695–1705

'boundary line' also found in these entries (note: many are not synonyms or translations):

Diomede Islands - across - border - border line - boundary - cold front - edge - partition line - party line - six - skyline - thalweg

Forum discussions with the word(s) "boundary line" in the title:

a line that forms the boundary between the land and the ocean or a lake
Cross boundary / cross the line
Does "boundary" mean a line or an irregular circle?
line / border / boundary

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