mainstream. Adj. In the cruise industry, a somewhat flexible term used to describe a cruise line, especially a large one, that seeks to appeal to a broad demographic. Usually, the term is applied to lines in the standard category, although some lines in the premium category are considered mainstream as well. Mainstream cruise lines tend to have the least expensive fares.
In context . . .
"The mainstream cruise industry may appear diverse, but it is dominated by a few major players."
Douglas Ward
Complete Guide To Cruising and Cruise Ships
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