Wordnet 3.0
NOUN (1)
1.
mail that is delivered by a special carrier (for an additional charge);
WordNet (r) 3.0 (2006):
special delivery
n 1: mail that is delivered by a special carrier (for an
additional charge)
Moby Thesaurus II by Grady Ward, 1.0:
29 Moby Thesaurus words for "special delivery":
PP, RD, RFD, airmail, book post, correspondence, direct mail,
direct-mail selling, express, fourth-class mail, frank,
halfpenny post, junk mail, letter post, letters, mail,
mail-order selling, mailing list, newspaper post, parcel post,
post, post day, registered mail, rural delivery,
rural free delivery, sea mail, seapost, special handling,
surface mail