What does "re-ed" mean? Is it slang?

Native speaker’s answer
Rebecca
The speaker is saying "re-ed," which is short for "re-education." Based on context clues, like the fact that he is lying in a hospital bed, injured, while talking to a doctor, means that he is most likely talking about "re-education." It's when a person retraining their capacity of movement, especially after an injury or illness. Ex: I have to focus really hard in my re-education classes in order to walk again. Ex: Re-education is very important after a major injury or stroke.