3 Terms and definitions [intro.defs]

3.55[defns.signature.member.templ]signature

⟨class member function template⟩ name, parameter-type-list, class of which the function is a member, cv-qualifiers (if any), ref-qualifier (if any), return type (if any), signature ([defns.signature.template.head]) of the template-head, and trailing requires-clause (if any)