Learner's definition of ARTIFICIAL
1 : not natural or real : made, produced, or done to seem like something natural
the world's first artificial heart
This product contains no artificial colors/flavors/sweeteners—only natural substances are used.
2 : not happening or existing naturally : created or caused by people
artificial price inflation
The country's borders are artificial, and were set with no consideration for the various ethnic groups in the region.
3 [more artificial; most artificial] : not sincere