Definition of

Tickle

  1. (noun, act) the act of tickling
  2. (noun, cognition) a cutaneous sensation often resulting from light stroking
  3. (verb, contact) touch or stroke lightly
  4. (verb, emotion) feel sudden intense sensation or emotion
  5. (verb, perception) touch (a body part) lightly so as to excite the surface nerves and cause uneasiness, laughter, or spasmodic movements

via WordNet, Princeton University

Origin of the word Tickle

  1. early 14c. (intrans.) "to be thrilled or tingling," of uncertain origin, possibly a frequentative form of tick (2) in its older sense of "to touch." The OE form was tinclian. Some suggest a metathesis of kittle (M.E. kytyllen), from Du. kietelen, from a common North Sea Gmc. word for "to tickle" (cf. O.N. kitla, O.H.G. kizzilon, Ger. more

via Online Etymology Dictionary, ©2001 Douglas Harper

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