1) the whole training and education of children (which relates to the cultivation of mind and morals, and employs for this purpose now commands and admonitions, now reproof and punishment) It also includes the training and care of the body
2) whatever in adults also cultivates the soul, especially by correcting mistakes and curbing passions.
2a) instruction which aims at increasing virtue
2b) chastisement, chastening, (of the evils with which God visits men for their amendment)
Part of Speech: noun feminine
Citing in TDNT: 5:596, 753
From G3811; tutorage, that is, education or training; by implication disciplinary correction: - chastening, chastisement, instruction, nurture.