A device or tool used to make something straight, especially hair. She used a straightener to smooth out her curly hair before the event.
A person or thing that straightens something. The metal straightener was essential in the manufacturing process to ensure the rods were perfectly aligned.
An alcoholic drink taken to steady the nerves, especially after previous drinking (informal). He poured himself a quick straightener before heading back to work.
A fistfight or contest arranged to settle a dispute fairly (chiefly British, informal). They agreed to have a straightener behind the pub to put the argument to rest.