Wordnet 3.0
NOUN (1)
1.
(Roman Catholic Church) a representative of the Holy See in a country that has no formal diplomatic relations with it;
The Collaborative International Dictionary of English v.0.48:
Apostolic delegate \Ap`os*tol"ic del"e*gate\ (R. C. Ch.)
The diplomatic agent of the pope highest in grade, superior
to a nuncio.
[Webster 1913 Suppl.] Apostolicism
WordNet (r) 3.0 (2006):
apostolic delegate
n 1: (Roman Catholic Church) a representative of the Holy See in
a country that has no formal diplomatic relations with it