Definitions

1. adjective

having or showing a tendency to laugh or be amused; easily amused, especially by something silly or trivial

“Her ticklish sense of humor made her laugh at even the most mundane jokes.”

2. noun

the quality of being ticklish; a tendency to laugh or be amused; a feeling of amusement or laughter

“The ticklish sensation in her side made her giggle uncontrollably.”