To make something international in scope or character. The company decided to internationalize its operations to reach a global market.
To bring under international control or influence. The government proposed to internationalize the disputed territory to prevent further conflict.
To design or adapt (software, a product, etc.) so that it can be easily localized for different languages and regions. The developers internationalized the app to support users worldwide.
To become international in character or scope. Association football internationalized rapidly during the 20th century.