straighten straighten /ˈstreɪtən/

verb

1. () Straighten up or out; make straight  ( unbend , straighten )
   straighten up or out; make straight
    She straightened her curly hair for a sleek look
   She straightened her curly hair for a sleek look
   
2. () Make straight  ( straighten out , straighten )
   make straight
   
3. () Get up from a sitting or slouching position  ( straighten )
   get up from a sitting or slouching position
    The students straightened when the teacher entered
   The students straightened when the teacher entered
   
4. () Put (things or places) in order  ( neaten , straighten out , tidy , clean up , square away [ N. American] , straighten , tidy up , declutter )
   put (things or places) in order
    Tidy up your room!
   Tidy up your room!
   
5. Make straight or straighter  ( straighten )
   make straight or straighter
    Straighten this post
   Straighten this post
    Straighten hair
   straighten hair
   
6. Straighten by unrolling  ( roll out , straighten )
   straighten by unrolling
    Roll out the big map
   roll out the big map