The phrase "train up" means to teach, instruct or educate someone in a particular skill, behavior or knowledge. It can also mean to encourage and help someone develop their abilities and talents. The term is often used in relation to children, where parents or guardians take responsibility for teaching them about life skills, values, manners and education. In the context of workplace training, "train up" refers to providing employees with opportunities to learn new skills that will help them perform their job better or prepare them for a promotion.