Mettre une affaire en train = To put a thing in hand.
Pas dans le train = Not up-to-date; Of an older school.
Il le mène bon train dans cette affaire = He drives him hard in that matter.
Il nous a menés bon train = He brought us along at a great rate.
Allez toujours votre train = Go on as usual.
Il est en train d’écrire = He is in the act of writing; He is just writing.
Je ne suis pas en train ce matin = I do not feel myself this morning.
Il est en train (pop.) = He is slightly intoxicated.
Faire du train (pop.) = To kick up a dust.