Bedeutung von “radiation” — Learner’s Dictionary

radiation

noun [ U ] us uk /ˌreɪdiˈeɪʃən/
HARMFUL ENERGY

a form of energy that comes from a nuclear reaction and that in large amounts can be very dangerous:

dangerously high levels of radiation
radiation sickness
HEAT

energy from heat or light that you cannot see:

solar/microwave radiation

(Definition von “radiation” aus dem Cambridge Learner's Dictionary © Cambridge University Press)