Gr. Antiq. Also undecem-. [f. L. undecim eleven + vir man, after Gr. οἱ ἕνδεκα.] pl. The body of eleven magistrates in ancient Athens. Hence Undecimvirate.

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1728.  Chambers, Cycl., s.v., The Functions of the Undecimrviri at Athens, were much the same as those of the Prevots de Marechaussee in France.

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1775.  Ash, Undecemvirate..., the office or dignity of the undecemviri.

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