› [T] to teach someone the skills and knowledge needed for a particular job or activity: Younger recruits are considered easier to train. It takes at least six years to train a doctor.train sb to be/do sth We trained them to be computer specialists. › [I] to learn the skills and knowledge needed for a particular job or activity: train as sth He trained as an accountant.train for sth Rebecca is training for her commercial truck driving certificate.train to be/do sth They were training to be pilots.