developmental /dɪˌvɛləpˈmɛntəl/adjective 1noun 1forms 1 adjective1 •Related to development.Developmental psychology studies how the mind forms as children and adolescents grow. noun1 •A trainee flight controller.Mr. Paguaga said: “We do have a pipeline of people that are developmentals coming into the building. — 2007 formsdevelopmentals