1. To make someone laugh by lightly touching a sensitive part of the body with the fingers, a feather, etc.: The mother tickled her baby under the chin.
2. To have or to cause a slightly uncomfortable feeling on a part of the body: When Mark wore the sweater, the tag in the back of neck area tickled his neck.
3. To please or to amuse someone: The comedian tickled the crowd with his jokes.

The puppy's playing around tickled the family.

That which interests or attracts someone: Mary asked, "Do either of these trips tickle your fancy?"