Meaning of naturalisation

Definition of naturalisation

(noun) the quality of being brought into conformity with nature
the proceeding whereby a foreigner is granted citizenship
the introduction of animals or plants to places where they flourish but are not indigenous
changing the pronunciation of a borrowed word to agree with the borrowers' phonology; "the naturalization in English of many Italian words"

Other information on naturalisation

WIKIPEDIA results for naturalisation
Amazon results for naturalisation