expositive
/ɛksˈpɒzɪtɪv/ EX-poz-ih-tiv
Definitions
1. adjective
relating to or given in a detailed explanation or demonstration
“The documentary was an expositive piece of journalism, thoroughly explaining the complexities of the issue.”
2. noun
a person or thing that gives a detailed explanation or demonstration
“The expositive expert in the field explained the new technology to the audience.”