regulationreg·u·la·tion /ˌregjəˈleɪʃən/ noun1[countableC]LAW an official rule or orderThe company was found to be in breach of (=to be breaking) health and safety regulations.
Tighter regulations are being introduced to protect the environment from car exhaust emissions.
→ building regulation2[singular, uncountableU] control over something, especially by rulesthe regulation of public spending
City regulation has failed to deal with insider-dealing and market manipulation.
There needs to be tighter regulation of advertisements for drugs.
→ statutory regulation