The Collaborative International Dictionary of English v.0.48:

Elusion \E*lu"sion\, n. [LL. elusio, fr. L. eludere, elusum. See
   Elude.]
   Act of eluding; adroit escape, as by artifice; a mockery; a
   cheat; trickery.
   [1913 Webster]

WordNet (r) 3.0 (2006):

elusion
    n 1: the act of avoiding capture (especially by cunning) [syn:
         slip, elusion, eluding]

Moby Thesaurus II by Grady Ward, 1.0:

42 Moby Thesaurus words for "elusion":
   avoidance, avoiding reaction, buck-passing, circumvention,
   defense mechanism, dodge, duck, elusiveness, equivocation, escape,
   eschewal, evasion, evasive action, evasiveness, foiling,
   forbearance, forestalling, forestallment, frustration,
   getting around, getting round, jink, neutrality, nonintervention,
   noninvolvement, outguessing, outmaneuvering, outwitting,
   passing the buck, prevention, refraining, runaround, shunning,
   shunting off, shy, sidestep, sidetracking, slip, the runaround,
   the slip, thwarting, zigzag