Definition of grayling
1an edible freshwater fish of Eurasia and North America that is silvery-gray with horizontal violet stripes and has a long, high dorsal fin.
- Genus Thymallus, family Salmonidae: several species
2a mainly brown European butterfly that has wings with bright eyespots and grayish undersides.
- Hipparchia semele, subfamily Satyrinae, family Nymphalidae