Bermuda Grass Definition

A mat-forming perennial grass (Cynodon dactylon) widespread in warm regions and grown as a lawn and pasture grass in the southern United States.
American Heritage
A creeping perennial grass (Cynodon dactylon) widely grown in warm climates as a lawn or pasture grass, esp. in the S U.S.
Webster's New World

A perennial grass, of the genus Cynodon, native to Africa and Asia, used in warm areas of the world for pasture, lawn and making hay.