The Collaborative International Dictionary of English v.0.48:

Memorialize \Me*mo"ri*al*ize\, v. t. [imp. & p. p.
   Memorialized; p. pr. & vb. n. Memorializing.]
   To address or petition by a memorial; to present a memorial
   to; as, to memorialize the legislature. --T. Hook.
   [1913 Webster]

WordNet (r) 3.0 (2006):

memorialize
    v 1: address in a memorial; "The President memorialized the
         heroes of the battle" [syn: memorialize, memorialise]
    2: be or provide a memorial to a person or an event; "This
       sculpture commemorates the victims of the concentration
       camps"; "We memorialized the Dead" [syn: commemorate,
       memorialize, memorialise, immortalize, immortalise,
       record]

Moby Thesaurus II by Grady Ward, 1.0:

45 Moby Thesaurus words for "memorialize":
   accost, apply to, approach, beat the drum, bespeak,
   blow the trumpet, bring to mind, call on, call upon, celebrate,
   circulate a petition, commemorate, dress ship, etch, eulogize,
   fire a salute, grave, hallow, hold jubilee, honor, impress,
   imprint, jog, jubilate, jubilize, keep, maffick, make merry, mark,
   monument, monumentalize, nudge, observe, petition, pray,
   prefer a petition, remember, remind, sign a petition, signalize,
   solemnize, solemnly mark, sound a fanfare, sue, trepidation