The act of travelling or sightseeing, particularly away from one's home. / The industry in which such travels and sightseeing are organized.

plural of tourism

Travel to another country for the purpose of sexual intercourse with prostitutes or for the purpose of engaging in sex acts which are prohibited in one's home jurisdiction.

(derogatory) Travelling across international borders, generally from a rich country to a poor country, to deliver healthcare, often on a temporary basis.

Travel for the purpose of committing suicide, as for example to a country where assisted suicide is legal.

(law, derogatory) A form of forum shopping in which plaintiffs choose to file libel suits in jurisdictions thought more likely to give a favourable result.

Space travel for recreational, leisure or business purposes. / (dated) Sightseeing and travel to sites related to the space program.

Travel for the purpose of claiming benefits or social welfare.

(idiomatic) Travel from one country to another for the purpose of giving birth in the second country, thereby endowing the newborn child with citizenship of the second country.

Travel for the purpose of obtaining an abortion where it is legal.