Bedeutung von “insomnia” — Learner’s Dictionary

insomnia

noun [ U ] us uk /ɪnˈsɒmniə/

the problem of not being able to sleep:

Many people suffer from insomnia.
insomniac noun [ C ] us uk /ɪnˈsɒmniæk/

someone who often finds it difficult to sleep

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