a. [mod. f. prec., by form-assoc. with adjs. in -orial formed by suffix -AL on L. adjs. in -ōrius, f. sbs. in -or; as senator, senatori-us, senatori-al: see -ORIAL.] Of or pertaining to an ambassador.
1759. H. Walpole, Lett., 343 (1834), III. 320. To prepare your ambassadorial countenance.
1778. Laurens, in Sparks, Corr. Am. Rev. (1853), II. 117. Our Ambassadorial Commissioners … are unhappily divided in sentiments.
1866. J. Martineau, Ess., I. 366. They recognize the ambassadorial credentials of Conscience.
1881. Echo, 16 Feb., 3/4. The Ambassadorial Affront at Rome.
