trait

1. (biology, psychology) An identifying characteristic, habit or trend.Examples: "inherited traits and acquired traits"; "The number one personality trait I hate is hypocrisy. Why can't you be consistent!?"; "The English, of all classes, value themselves on this trait, as distinguishing them from the French, who, in the popular belief, are more polite than true."Synonyms: characteristic

2. (object-oriented programming) An uninstantiable collection of methods that provides functionality to a class by using the class’s own interface.Examples: "Traits are somewhat between an interface and a mixin."; "Traits are parametrized on other methods, which must be provided to create a class using the trait. Using a trait-like mechanism to compose large collections of mutually-dependent classes or traits could lead to parameter explosion."