What is "funambulatory"

Funambulatory \Fu*nam"bu*la`to*ry\, a.

1. Performing like a ropedancer.
   --Chambers.

2. Narrow, like the walk of a ropedancer.

   This funambulatory track.
   --Sir T. Browne.

a. 1 Performing in the manner of a tightrope walker. 2 narrow, like a tightrope