1. the ability to speak, write, or understand three or more languages fluently or competently
Usage: uncountable noun; often used in educational and linguistic contexts
2. the practice or state of using multiple languages within a community, organization, or society
Usage: uncountable noun; sociological and policy contexts

Examples

• Growing up in a multilingual household, she developed multilingualism naturally by hearing three languages daily.
• The school's commitment to multilingualism helped students become fluent in English, Spanish, and Mandarin.
• Multilingualism is increasingly valued in the global job market.
• Countries with multilingualism as a norm often have richer cultural exchanges.
• Research shows that multilingualism can enhance cognitive flexibility in children.
• The European Union promotes multilingualism as a key educational goal.