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Webster 1828 Edition

Noun.

[L. funis, rope, and ambulo, to walk.] A rope walker or dancer.

funambulist ‎(plural funambulists)

A tightrope walker or a similar performer on a slack rope.
- 2012 June 14, David Hakim, "After Century-Long Wait, Stage Is Set for Man Daring to Cross the Falls," New York Times (retrieved 1 August 2013):
  A female funambulist, Maria Spelterini, on various occasions tightrope-walked across the Niagara Gorge with peach baskets on her feet, blindfolded, or manacled.

tightrope walker — see tightrope walker