Bow

• bow [countable]
• 1 a weapon used for shooting arrows, made of a long thin piece of wood held in a curve by a tight string:
• a bow and arrow
• 2 a knot of cloth or string with a curved part on either side, and two loose ends, worn in the hair as decoration or for tying shoelaces:
• Ella wore a bow in her hair.
• in a bow
• long chestnut hair tied back in a bow
• 3 a long thin piece of wood with a tight string fastened along it, used to play musical instruments such as the violin or cello

• ➔ have more than one string to your bow

   at string1 (8)

Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.