From Longman Dictionary of Contemporary Englishlegalisele‧gal‧ise /ˈliːɡəlaɪz/ verb [transitive] a British spelling of legalize→ See Verb table
Examples from the Corpus
legalise• Banning drugs mainly promotes crime, so it would be better to legalise, control, tax and discourage them.• The Government wants to legalise payment of higher salaries to non-trade union members.• However, is it not time to consider the possibility of legalising soft drugs, especially cannabis?• If we were to legalise soft drugs, that would no longer be a problem.• Hey, why not legalise them?• Would it be the policy of the Labour party to legalise those drugs?• The legislation is not intended to legalise what already happens in the industry. 