Present participle of delimitate; the process of marking, determining, or fixing boundaries or limits.
From delimitate (de- + limitare) + -ing (gerund). Rare modern form, maintained primarily in formal or historical contexts, slightly more flowery than the common 'delimit.'
In international law, 'delimitating boundaries' is still the formal phrase used when countries negotiate borders—it's the verb for when diplomats literally draw lines on maps and argue about which millimeter belongs to whom.
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