The Collaborative International Dictionary of English v.0.48:

Allege \Al*lege"\ ([a^]l*l[e^]j"), v. t. [imp. & p. p. Alleged
   (-l[e^]jd"); p. pr. & vb. n. Alleging.] [OE. aleggen to
   bring forward as evidence, OF. esligier to buy, prop. to free
   from legal difficulties, fr. an assumed LL. exlitigare; L. ex
   + litigare to quarrel, sue (see Litigate). The word was
   confused with L. allegare (see Allegation), and lex law.
   Cf. Allay.]
   1. To bring forward with positiveness; to declare; to affirm;
      to assert; as, to allege a fact.
      [1913 Webster]

   2. To cite or quote; as, to allege the authority of a judge.
      [Archaic]
      [1913 Webster]

   3. To produce or urge as a reason, plea, or excuse; as, he
      refused to lend, alleging a resolution against lending.
      [1913 Webster]

   Syn: To bring forward; adduce; advance; assign; produce;
        declare; affirm; assert; aver; predicate.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Allege \Al*lege"\, v. t. [See Allay.]
   To alleviate; to lighten, as a burden or a trouble. [Obs.]
   --Wyclif.
   [1913 Webster]

WordNet (r) 3.0 (2006):

allege
    v 1: report or maintain; "He alleged that he was the victim of a
         crime"; "He said it was too late to intervene in the war";
         "The registrar says that I owe the school money" [syn:
         allege, aver, say]