Entomology definition of Flex September 8, 2014 Raj Entomology Dictionary 0 Please Like Us!!! DesiGoogly.com > Education News > Entomology Dictionary > Entomology definition of Flex Entomology definition of Flex: to bend: to curve back. Entomology Flex definitionFlex Entomology explanationFlex Entomology meaningReviews & Comments