Humorous is an adjective that usually pertains to a joke, story, circumstance, or way of speaking. It means that the noun is funny, laughable, entertaining or displays comedy. In tone, it means the author’s intent is to be amusing or cause the audience to laugh.
A humorous dialogue:
Teacher: Why are you late, Frank?
Frank : Because of the sign.
Teacher: What sign?
Frank : The one that says “School Ahead, Go Slow”.
Teacher: John, why are you doing your Math multiplication on the floor?
John : You told me to do it without using tables.