The Collaborative International Dictionary of English v.0.48:

Dote \Dote\, v. i. [imp. & p. p. Doted; p. pr. & vb. n.
   Doting.] [OE. doten; akin to OD. doten, D. dutten, to doze,
   Icel. dotta to nod from sleep, MHG. t?zen to keep still: cf.
   F. doter, OF. radoter (to dote, rave, talk idly or
   senselessly), which are from the same source.] [Written also
   doat.]
   1. To act foolishly. [Obs.]
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            He wol make him doten anon right.     --Chaucer.
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   2. To be weak-minded, silly, or idiotic; to have the
      intellect impaired, especially by age, so that the mind
      wanders or wavers; to drivel.
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            Time has made you dote, and vainly tell
            Of arms imagined in your lonely cell. --Dryden.
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            He survived the use of his reason, grew infatuated,
            and doted long before he died.        --South.
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   3. To be excessively or foolishly fond; to love to excess; to
      be weakly affectionate; -- with on or upon; as, the mother
      dotes on her child.
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            Sing, siren, for thyself, and I will dote. --Shak.
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            What dust we dote on, when 't is man we love. --
                                                  Pope.
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The Collaborative International Dictionary of English v.0.48:

Doting \Dot"ing\, a.
   That dotes; silly; excessively fond. -- Dot"ing*ly, adv. --
   Dot"ing*ness, n.
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WordNet (r) 3.0 (2006):

doting
    adj 1: extravagantly or foolishly loving and indulgent; "adoring
           grandparents"; "deceiving her preoccupied and doting
           husband with a young captain"; "hopelessly spoiled by a
           fond mother" [syn: adoring, doting, fond]