The Collaborative International Dictionary of English v.0.48:
Maiden \Maid"en\, a.
1. Of or pertaining to a maiden, or to maidens; suitable to,
or characteristic of, a virgin; as, maiden innocence.
"Amid the maiden throng." --Addison.
Have you no modesty, no maiden shame ? --Shak.
2. Never having been married; not having had sexual
intercourse; virgin; -- said usually of the woman, but
sometimes of the man; as, a maiden aunt. "A surprising old
maiden lady." --Thackeray.
3. Fresh; innocent; unpolluted; pure; hitherto unused.
"Maiden flowers." --Shak.
Full bravely hast thou fleshed
Thy maiden sword. --Shak.
4. Used of a fortress, signifying that it has never been
captured, or violated. -- T. Warton. Macaulay.
Maiden assize (Eng. Law), an assize which there is no
criminal prosecution; an assize which is unpolluted with
blood. It was usual, at such an assize, for the sheriff to
present the judge with a pair of white gloves. --Smart.
Maiden name, the surname of a woman before her marriage.
Maiden pink. (Bot.) See under Pink.
Maiden plum (Bot.), a West Indian tree (Comocladia
integrifolia) with purplish drupes. The sap of the tree
is glutinous, and gives a persistent black stain.
Maiden speech, the first speech made by a person, esp. by a
new member in a public body.
Maiden tower, the tower most capable of resisting an enemy.
maiden voyage the first regular service voyage of a ship.
Moby Thesaurus II by Grady Ward, 1.0:
19 Moby Thesaurus words for "maiden speech":
coming out, curtain raiser, debut, embarkation, embarkment,
first appearance, floating, flotation, inaugural address,
inauguration, induction, initiation, installation, installment,
introduction, launching, opener, preliminary, unveiling