"Legal age" refers to the minimum age at which a person is considered an adult and can engage in certain activities, such as voting, drinking alcohol, or signing contracts. This age varies by country and activity, with common legal ages being 18 for voting and 21 for alcohol consumption in many places. Different countries have different laws regarding legal age, which can lead to confusion for travelers. For example, in the United States, the legal age for alcohol consumption is 21, while in many European countries, it is 18. Understanding these laws is important for compliance and safety.