Webster's Revised Unabridged Dictionary · 1913

Ambassador

Ambassador ({not transcribed}) , noun

[See Embassador.]

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

Ambassadors are either ordinary [or resident] or extraordinary, that is, sent upon some special or unusual occasion or errand.

2.
An official messenger and representative.

Also: Embassador