The Collaborative International Dictionary of English v.0.48:

Doxology \Dox*ol"o*gy\, n.; pl. Doxologies. [LL. doxologia,
   Gr. ?, fr. ? praising, giving glory; ? opinion, estimation,
   glory, praise (from ? to think, imagine) + ? to speak: cf. F.
   doxologie. See Dogma, and Legend.]
   In Christian worship: A hymn expressing praise and honor to
   God; a form of praise to God designed to be sung or chanted
   by the choir or the congregation.
   [1913 Webster]

         David breaks forth into these triumphant praises and
         doxologies.                              --South.
   [1913 Webster]

WordNet (r) 3.0 (2006):

doxology
    n 1: a hymn or verse in Christian liturgy glorifying God

Moby Thesaurus II by Grady Ward, 1.0:

56 Moby Thesaurus words for "doxology":
   Agnus Dei, Benedicite, Gloria, Gloria Patri, Gloria in Excelsis,
   Introit, Magnificat, Miserere, Negro spiritual, Nunc Dimittis,
   Te Deum, Trisagion, Vedic hymn, alleluia, answer, anthem, antiphon,
   antiphony, cantata, canticle, chant, chorale, church music, gospel,
   gospel music, hallelujah, hosanna, hymn, hymn of praise, hymn-tune,
   hymnody, hymnography, hymnology, introit, laud, mantra, mass,
   motet, offertory, offertory sentence, oratorio, paean, passion,
   prosodion, psalm, psalmody, recessional, report, requiem,
   requiem mass, response, responsory, sacred music, spiritual,
   versicle, white spiritual