The word amused means "pleasantly occupied" or "entertained.” If you love dogs, you’ll be amused just watching puppies frolic in the park all day. If you love everything, you’re easily amused.
Amuse comes from the Middle French word amuser, meaning "to divert the attention, beguile, delude." If on a boring rainy afternoon, you amused everyone, you entertained everyone, probably making them laugh. If you were ever told, "I'm not amused," however, this goes beyond not finding something funny — that person might be angry and offended at something you said or did.