1. To move backward; to recede or retreat (away from someone or something). We all moved back when we realized the bear was alive. Kids, move back! That snake is dangerous.

2. To cause or compel someone or something to move backward or away from someone or something. In this usage, a noun or pronoun can be used between "move" and "back." Police officers moved the crowd of people back from the scene of the crime. Would you move the TV back a ways? It's a little too close to the sofa.

3. To return to a previous location or position. I changed seats to be next to my friend during the play, but I moved back when an usher came and scolded me. The lever has a spring inside of it, so it will move back as soon as you let go.

4. To cause or compel someone or something to return to a previous location or position. In this usage, a noun or pronoun can be used between "move" and "back." Be sure to move the furniture back after you're done painting the walls. I tried sneaking to a seat in the back of the class so I could my book, but the teacher caught me and moved me back.