1. the process of granting citizenship to a foreign-born person who meets legal requirements
Usage: most common sense; legal/administrative context
2. the process of adopting or adapting something foreign into a new environment or culture
Usage: figurative use
3. in biology, the establishment of a non-native species in a new habitat where it reproduces naturally
Usage: scientific/ecological context

Examples

• She completed her naturalization process and became a U.S. citizen last year.
• The naturalization ceremony was held at the courthouse with hundreds of new citizens.
• The naturalization of foreign words into English happens gradually over time.
• Jazz underwent naturalization in Europe during the early 20th century.
• The naturalization of rabbits in Australia created ecological problems.
• Applicants must pass an English test as part of naturalization requirements.
• The naturalization of Buddhist practices in Western culture reflects cultural exchange.