A surveyor or overseer; a highway officer. Also, in some state the chief officer of a town; one of a board of county officers. Supervisors of election. Persons appointed and commissioned by the judge of the Circuit Court of the United States in cities or towns of over 20,000 inhabitants, upon the written application of two citizens, or in any county or parish of any congressional district upon that of ten citizens, to attend at all times and places fixed for the registration of voters for representatives and delegates in congress, and supervise the registry and mark the list of voters in such manner as will in their judgment detect and expose the improper removal or addition of any name.