Consensus (boolean alegbra) - Consensus theorems in Boolean algebra
Consensus (computer science) - achieving coherency among nodes of a distributed computer system.
There are additional meanings. As a starter, look for all terms beginning with word "consensus" in Wikipedia.
Medical consensus is a public statement on a particular aspect of medical knowledge available at the time it was written, and that is generally agreed upon as the evidence-based, state-of-the-art (or state-of-science) knowledge by a representative group of experts in that area. ... In molecular biology and bioinformatics, a consensus sequence is a way of representing the results of a multiple sequence alignment, where related seqeunces are compared to each other, and similar functional sequence motifs are found. ... This article may be too technical for most readers to understand. ...
Consensus upon a particular formal model of consensus can lead to groupthink, by making it harder for those who reject any that formal model to have their case heard out in informal terms or using a different model.
As this example suggests, the concept of consensus is a particularly important one in the context of society and government, and forms a cornerstone of the concept of democracy.
In some cases, consensus decision-making may encourage groupthink, a situation in which people modify their opinions to reflect what they believe others want them to think, leading to a situation in which a group makes a decision that none of the members individually think is wise.