Obesity has been considered a disease since the term existed. Overweight is the term that is used for weight that’s abnormally high without necessarily indicating disease.

There’s been some confusion around this because people erroneously defined bmi limits for obesity, but it has always referred to the concept of having such a high body fat content that it’s unhealthy/dangerous

This is false. Obesity wasn’t considered a disease until 2013. [1] The term has been around since the late 17th century [2]

[1]: https://obesitymedicine.org/blog/ama-adopts-policy-recognize...

[2]: https://www1.racgp.org.au/ajgp/2019/october/the-politics-of-...