1. In a way that affects or involves only one side, party, or group; without agreement or participation from others
The company decided unilaterally to change the contract terms.
A empresa decidiu unilateralmente alterar os termos do contrato.
2. Done by one person or party without consulting or obtaining consent from another
The government acted unilaterally on the new policy.
O governo agiu unilateralmente sobre a nova política.