What is Sanction ?
Sanction is (noun) 1. approval, permission You will need the sanction of the local authorities before you can knock the house down. 2. they imposed economic sanctions they placed restrictions on trade with a country in order to try to influence its political development(verb) to approve something The committee sanctioned the expenditure of £1.2m on the development project. Synonym authorise. Antonym veto
source: Easier English, Student Dictionary Upper Intermediate Level