Meaning of “hygiene” - Learner’s Dictionary

hygiene

noun [ U ] uk us /ˈhaɪdʒiːn/

the process of keeping things clean, especially to prevent disease:

health and hygiene regulations
dental/personal hygiene
hygienic uk us /haɪˈdʒiːnɪk/ adjective

very clean, so that bacteria cannot spread

(Definition of “hygiene” from the Cambridge Learner’s Dictionary © Cambridge University Press)