bowing

noun3

1. •
   The act of bending at the waist, as a sign of respect or greeting.

   • The courtier had practiced his bowing.
2. •
   A technique for using the bow on a string instrument such as a violin.

   • The bowing arm, the fingers on the strings, and then the violin itself polished brown, and the soloist's chin pillowed on it. — 1959
3. •
   A bending.

   • The heavy books caused a bowing in the shelf.