1. the process of exposing something to radiation, especially for medical treatment or food preservation
2. the emission or spreading of light, heat, or other energy from a source
3. intellectual or spiritual enlightenment
Usage: literary

Examples

• The cancer patient underwent irradiation therapy to shrink the tumor.
• Food irradiation helps extend shelf life by killing harmful bacteria.
• The irradiation from the sun provides energy for photosynthesis.
• Scientists measured the irradiation levels near the nuclear facility.
• The irradiation of the room by candlelight created a warm atmosphere.
• Her face showed the irradiation of sudden understanding.
• The irradiation process made the medical equipment sterile and safe to use.