It means 3+ years with a technology. It means don't walk in the door out of a Java college having used nothing else and apply to work on a Triple A game written in C++. It means don't show up after a weekend html course and apply for a job using Node/React. And before you say "well that isn't me for so and so reason", it happens ALL the time to employers.
An entry level position does not mean you get to learn on the job from scratch or near scratch. It means that you are at least capable enough to work on small or easy problems and features and an employer or other devs can coach you along the way and you'll know what they are saying to you.
That's all it means (to any reasonable employer).