em ‧ is ‧ sa ‧ ry /ˈeməs ə ri, ˈemɪs ə ri $ -seri/ BrE AmE noun ( plural emissaries ) [countable]
[ Date: 1600-1700 ; Language: Latin ; Origin: emissarius , from emittere ; ⇨ ↑ emit ]
someone who is sent with an official message or to do official work SYN envoy :
Japan is sending two emissaries to Washington to discuss trade issues.