2. in sports, a player whose primary role is to score goals or points
The team's best attacker scored a hat-trick.
O melhor atacante do time marcou um hat-trick.
3. in cybersecurity, a person or entity attempting to breach systems or networks
Cybersecurity experts are tracking the attacker's methods.
Especialistas em cibersegurança estão rastreando os métodos do atacante.