There are several synonyms for the phrase "in the majority," which is commonly used to describe a situation where the greater number or percentage of a group or population are in agreement on a particular issue. Some alternative phrases that could be used include "most people," "the greater portion," "the vast majority," "a substantial number," "the prevailing view," "the mainstream opinion," or "the dominant perspective." Depending on the context, some of these synonyms may be more appropriate than others, but all of them convey a sense of agreement or consensus among a significant number of people.