Consensus is strictly 100% agreement (or at least 0% disagreement). Granted, it's not always possible. But in some setups and given some objectives, it's sometimes possible to have a collective that finds compromises that satisfy everyone (consensus).
> Consensus is not synonymous with unanimity – though that may be a rule agreed to in a specific decision-making process.[1]
[1]https://en.wikipedia.org/wiki/Consensus_decision-making