► legalallowed, ordered, or approved by law: Fireworks are legal in this state. They have a legal requirement to put a fence around their swimming pool.
► lawful formal allowed or officially accepted by the law. Used especially to compare something with actions or methods that are not legal: The FBI will use all reasonable and lawful means to gather information.
► legitimate allowed by law or doing things in a legal way. Used especially about activities or organizations: Robinson said that the money was used for legitimate business purposes.
► permitted allowed by a rule or law: Smoking is only permitted in two rooms in the building.
► constitutional legal according to the system of rules of a country: A Supreme Court decision in 1954 ruled that segregated education was not constitutional.
► statutory formal decided or controlled by law: In the event of a national emergency, the president may act without statutory authorization.
► valid if a ticket or official document is valid, you can use it according to official rules or laws: The tickets are valid for six months.
► authorized/official officially allowed or permitted for use by the person or organization who owns something: This is the only authorized biography of the Queen that is for sale right now. This is the official website of the 2014 Olympic Winter Games.