What does ambassador or embassador mean?
The definition of ambassador and embassador
Am*bas”sa*dor, Em*bas”sa*dor, n.
Etym: [See Embassador.]

1 A minister of the highest rank sent a foreign court to represent there his sovereign or country.

Note: Ambassador are either ordinary [or resident] or extraordinary, that is, sent upon some special or unusual occasion or errand. Abbott.

2 An official messenger and representative.