noun
Refers to self-control, orderly conduct, or systematic training, often in sports, military, or personal development contexts.
彼は毎朝のランニングで強いディシプリンを身につけた。
He developed strong discipline through his daily morning runs.
noun
academic discipline; field of study
Used in academic contexts to refer to a specific branch of knowledge or field of study.
Sociology is a relatively new academic discipline.