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Added 9 October 2026

boundary

/ˈbaʊndɹi/ noun

In Latin: terminus, finis Wiktionary

noun Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about boundary at Wordnik → Where our words come from →

The line or plane indicating the limit or extent of something.
A line determining the limits of an area.
The greatest possible degree of something.
what he did was beyond the bounds of acceptable behavior

Origin

From bound + -ary. Semantically displaced native Old English mearc (“boundary, limit”) whence Modern English mark.

From Wiktionary, via Kaikki.org (CC BY-SA)

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