1. A restriction or prevention of entry to a place, service, or resource
The government imposed an access block on the website.
O governo impôs um bloqueio de acesso ao site.
2. In computing, a security measure that prevents unauthorized users from reaching a system or data
The firewall created an access block for suspicious IP addresses.
O firewall criou um bloqueio de acesso para endereços IP suspeitos.
3. A physical barrier preventing entry to an area
There was an access block at the entrance due to construction.
Havia um bloqueio de acesso na entrada devido à construção.