The fact that all visitors are firstly travellers
A visitor is also a traveller who sojourns a place or country ordinarily outside his typical beat area for non-immigration and non-remunerative purposes, whose movement is of pro tern nature as finally he comes round again to the place of origin i.e., the place from where he at first embarked upon his trip.
A tourist is a visitor who is motivated to travel put side his ‘beat area’ for recreation, pleasure, health, study, sports, business, family and so forth; stays for at least 24 hours at the place of visit, does not involve in any remunerative activity and in due time returns to his place of domicile. It implies that all tourists are travellers/ visitors but all travellers/visitors are not tourists. On top of tha it is a fact that all visitors are firstly travellers but the vice-versa may not hold good.
The Excursionist: An excursionist is different from a tourist in terms of duration of stay at the destination as his period of stay at the place of visit is less than 24 hours. However, it is also true that an excursionist is essentially a traveller and a visitor.
A traveller and a visitor who goes past a country or place without having a stop over or breaking off his journey on the way other than for layover and for transportation links. Alternatively, a person, moving past a country and while it may take more than 24 hours in the process, would not be considered as a tourist or excursionist if his destination is a different country and is just passing through the in-between country owing to transport ties.