1. A field of study or practice that has mature methodologies, established principles, and systematic frameworks
Psychology is now a well-developed discipline with rigorous research standards.
A psicologia é agora uma disciplina bem desenvolvida com padrões rigorosos de pesquisa.
2. A practice or habit that is firmly established and maintained with consistency
His morning exercise routine is a well-developed discipline.
Sua rotina de exercício matinal é uma disciplina bem desenvolvida.