Lit. 'a sworn man'. Someone sworn to do something, i.e. carry out a duty on oath; someone sworn to give information at a court. The term was also used of the *burgess in English towns who swore to advise faithfully. In Sark, a jurat was one of the island's magistrates, elected for life. The Latin form is juratus. [< Lat. juro = to swear] -
Cf. Jurati ad arma
Dictionary of Medieval Terms and Phrases. Christopher Coredon with Ann Williams.