What does retrain mean?
Retrain means to train again, usually because someone is changing careers, learning a new skill, or adapting to updated methods and technology. It can also describe updating a machine or computational model with fresh training. In employment contexts, retraining often refers to structured education or workplace instruction that prepares workers for a new role, particularly when their previous experience remains useful but is not sufficient by itself. The word can imply a deliberate return to learning after a period of specialization, inactivity, or technological change. It is widely used in British and American English and has a practical, forward-looking connotation: existing knowledge is treated as a starting point rather than discarded. The related expression “retrain for a new job” is especially common in discussions of employment policy and lifelong learning.
verbTo train again, especially to acquire new skills or prepare for a different role or activity. It can also mean to train a person, system, or machine again after changes or a period of inactivity.
- To train again in order to acquire new skills or prepare for a different occupation or role.
- To train or update a machine or computational model again using additional or revised data.
- To become trained again after a period of inactivity or after circumstances have changed.
"After years in one profession, she decided to retrain as a software engineer."
"The hospital retrained staff to use the new electronic medical-record system."
"Engineers retrained the model with more recent data to improve its predictions."
"After a long absence from the stage, she returned to retrain at the conservatory."
Retraining gives a second career a head start: it turns previous experience into a foundation for a new kind of expertise.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does retrain come from?
Retrain was formed in English by combining the prefix re-, meaning “again,” with the verb train. The prefix re- has long been used to indicate repetition or a fresh start, while train derives through Old French from Latin roots associated with drawing or pulling. The compound therefore expresses the idea of undertaking training anew, whether for a person, a workforce, or a technological system.
Related word forms
How retrain is actually used
The word is common in employment, education, and professional-training contexts. In technical writing, it is also used for retraining machine-learning models or other systems.
Easily confused with retrain
Retrain means to train again, whereas refrain means to abstain from doing something or, in music, to repeat a musical phrase.