1. to play (games, sports); to enjoy oneself; to have a good time

2. to mess about (with alcohol, gambling, philandery, etc.)

3. to be idle; to do nothing; to be unused

4. to meet up (with friends); to hang out

5. to give oneself up (to gambling, drinking, etc.)

6. to go to (for pleasure or for study) (as 〜に遊ぶ)

7. to tease (someone); to play (with)

8. to intentionally throw a ball to lower the batter's concentration