trial and error noun
: a finding out of the best way to reach a desired result or a correct solution by trying out one or more ways or means and by noting and eliminating errors or causes of failure; also : the trying of one thing or another until something succeeds
First Known Use of TRIAL AND ERROR
Seen & Heard
What made you want to look up trial and error? Please tell us where you read or heard it (including the quote, if possible).