Source : Webster's Revised Unabridged Dictionary (1913)

Unaffected \Un`af*fect"ed\, a.
   1. Not affected or moved; destitute of affection or emotion;
      uninfluenced.

            A poor, cold, unspirited, unmannered, Unhonest,
            unaffected, undone fool.              --J. Fletcher.

   2. Free from affectation; plain; simple; natural; real;
      sincere; genuine; as, unaffected sorrow. --
      {Un`af*fect"ed*ly}, adv. -- {Un`af*fect"ed*ness}, n.

Source : WordNet®

unaffected
     adj 1: undergoing no change when acted upon; "entirely unaffected
            by each other's writings"; "fibers remained apparently
            unaffected by the treatment" [ant: {affected}]
     2: (followed by `to' or `by') unaware of or indifferent to;
        "insensible to the suffering around him" [syn: {insensible(p)},
         {unaffected(p)}]
     3: free of artificiality; sincere and genuine; "an unaffected
        grace" [ant: {affected}]
     4: not touched emotionally; "was left untouched by the music"
        [syn: {unaffected(p)}, {untouched(p)}]