Meaning of hygiene | Babel Free

Definitions

1. The science of health, its promotion and preservation
2. Those conditions and practices that promote and preserve health
3. Cleanliness
4. The property of having an expansion that is guaranteed not to cause the accidental capture of identifiers
5. This term needs a definition. Please help out and add a definition, then remove the text {{rfdef}}

Translations

CEFR level