From cppreference.com
template<classT>conceptmovable=std::is_object_v<T>&&std::move_constructible<T>&&std::assignable_from<T&,T>&&std::swappable<T>;(since C++20)The concept movable<T> specifies that T is an object type that can be moved (that is, it can be move constructed, move assigned, and lvalues of type T can be swapped).
References
C++23 standard (ISO/IEC 14882:2024):
18.6 Object concepts [concepts.object]
C++20 standard (ISO/IEC 14882:2020):
18.6 Object concepts [concepts.object]
See also
(C++20)
specifies that an object of a type can be copied, moved, and swapped
(concept)