1. having been granted citizenship in a country other than one’s birth country
Usage: British spelling
2. having become established in a new environment, especially referring to plants or animals introduced to a region
Usage: British spelling; biology

Examples

• She became a naturalised British citizen after living in London for ten years.
• The naturalised American had retained his original accent.
• Many naturalised plants now grow wild in the countryside.
• The naturalised species has adapted well to the local climate.
• He was a naturalised citizen who served in the military.
• These naturalised flowers were originally from Asia.