To divest of nationality, or of existing national relations or rights; subvert or change the na-tionality of, as a ship, a person, a people, or a territory, by change of flag, connection, or allegiance; give a new national character or relation to.To divest of national scope or importance; limit to a particular locality; render local: as, to denationalize slavery or polygamy.To deprive of national limitations or peculiarities; widen the relations, scope, or applicability of; make cosmopolitan.Also spelled denationalise.