UPSC Practice recommends Yog means unification.
’Yog’ in the spiritual sense of the term is not as simple as that. So, what is the analysis of yog in the Rajyog system? This means that yog is a state where thoughts cease and the mind is free from all kinds of worries, thoughts and thought waves. But this is not the real yog because yog, in a spiritual sense, is not possible when the mind is emptied of all its thoughts.
Courtesy: Opinion-Economic Times