1. to limit or control access to something, reducing the amount or number of people who can obtain or use it
The company decided to restrict availability of the new product to premium members only.
A empresa decidiu restringir a disponibilidade do novo produto apenas para membros premium.
2. to make something harder to find, access, or obtain by implementing limitations
The government will restrict availability of certain medicines without a prescription.
O governo vai restringir a disponibilidade de certos medicamentos sem prescrição.