I did take Algorithms.

The definition we learned (let me know if I am wrong) is that an algorithm is a concrete set of steps to accomplish some goal in a finite amount of time given legitimate inputs.

Although in practice we use this more for stuff with a math formula and/or stuff you code. “Given the input of the world, if your eyes see it is raining outside, grab the umbrella from your closet. If you don’t see the umbrella, search for it. If the search takes 5+ minutes, just go to your destination” is an algorithm for trying to not get rained on, but in practice nobody’s going to be using that word that way.

I think the definition used online today is “some computer code that I can’t reliably determine the input/output of, that is used to my/society’s disadvantage in an exploitative way.”

Words evolve, and the word you learn in academia sometimes also gets used in real life and its usage changes in real life from what you would use in academia. And sometimes academia keeps using it that way, and real life keeps using it their different way, and so you use the same word while talking about slightly different concepts. And sometimes people in real life use it the academic way, others don’t, making things even more confusing… you just have to be aware people are using the same word to talk about two different things (or in this case, one group uses the word to talk about an unpleasant subset of the thing the other group uses the word to talk about) and clear up that misunderstanding.