Definitions of straighten

1. To make straight.

2. To become straight.

3. straighten by unrolling; " roll out the big map"

4. straighten up or out; make straight

5. make straight or straighter; " Straighten this post"; " straighten hair"

6. To make straight; to reduce from a crooked to a straight form.

7. A variant of Straiten.

8. To make, or become, straight.