1. (noun)implantation, nidation (embryology) the organic process whereby a fertilized egg becomes implanted in the lining of the uterus of placental mammals Synonyms: nidation, implantation
2. (noun)implantation the act of planting or setting in the ground Synonyms: nidation
3. (noun)implantation a surgical procedure that places something in the human body Synonyms: nidation