verb, -ized, -iz⋅ing.| 1. | to bring under the ownership or control of a nation, as industries and land: a movement to nationalize the oil industry. |
| 2. | to make into a nation. |
| 3. | to naturalize. |
| 4. | to make national in extent or scope: a magazine article that nationalized a local problem. |
| 5. | to become nationalized or naturalized: Those who remain in the country must nationalize. |