nat ‧ u ‧ ral ‧ ize BrE AmE ( also naturalise British English ) /ˈnætʃ ə rəlaɪz/ verb
[ Word Family: noun : ↑ nature , ↑ naturalist , ↑ naturalism , ↑ naturalization , ↑ naturalness , the supernatural, ↑ natural , ↑ naturist , ↑ naturism ; adverb : ↑ naturally ≠ ↑ unnaturally , ↑ naturalistically , ↑ supernaturally ; adjective : ↑ natural ≠ ↑ unnatural , ↑ supernatural , ↑ naturalistic ; verb : ↑ naturalize ]
be naturalized if someone born outside a particular country is naturalized, they become a citizen of that country
—naturalization /ˌnætʃ ə rəlaɪˈzeɪʃ ə n $ -lə-/ noun [uncountable]