verb (used with object), out·sang, out·sung, out·sing·ing.
  1. to sing better than.
  2. to sing louder than.

Origin of outsing

First recorded in 1595–1605; out- + sing
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for outsung

Historical Examples of outsung