A UK visitor visa – also known as a UK tourist visa – enables people to visit the UK for business, leisure, to get private....
https://www.visaandmigration.com/service/uk-visitor-or-tourist-visa/36.html

To be eligible for a spouse visa, the applicant must either be married or in a civil partnership with someone who is already resident in....
https://www.tiptopface.com/read-blog/2344_condition-for-uk-spouse-visa.html