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Webster 1913 Edition

Adj.

[L.

conterminare

to border upon, fr.

conterminus

conterminous;

con-

terminus

border.]

Having the same bounds; conterminous.

[Obs.]

B. Jonson.

Adj.

Having the same bounds.

conterminate ‎(not comparable)

(obsolete) Having the same bounds or extent; conterminous.
(Can we find and add a quotation of Ben Jonson to this entry?)