The definition of macroevolution is a large-scale change in the evolution of a species.
An example of macroevolution is when feathers appeared on some dinosaurs evolving into birds.
large-scale and long-range evolution involving the appearance of new genera, families, etc. of organisms
Large-scale evolution occurring over a very long period time that results in the formation of new species and higher-level taxonomic groups.
(usually uncountable, plural macroevolutions)
macro- +"Ž evolution