01 n. That which indicates or fixes a limit or extent, or marks a bound, as of a territory; a bounding or separating line; a real or imaginary limit.
pl.
Boundaries
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1.
That which indicates or fixes a limit or extent, or marks a bound, as of a territory; a bounding or separating line; a real or imaginary limit.“But still his native country lies Beyond the boundaries of the skies.” — N. Cotton.“That bright and tranquil stream, the boundary of Louth and Meath.” — Macaulay.“Sensation and reflection are the boundaries of our thoughts.” — Locke.