1. Romantic or sexual relationships between two people that are not committed, exclusive, or long-term in nature
They decided to keep their relationship casual without any serious commitment.
Eles decidiram manter relações casuais sem nenhum compromisso sério.
2. Informal, non-committal romantic or sexual encounters
After the breakup, she preferred casual relationships over serious dating.
Após o término, ela preferiu relações casuais a namorados sérios.