olemus
Wiktionary, adj
1. not formal or ceremonious
an informal get-together
3. suited for everyday use
informal clothes

näiteid
ISO/IEC 15408-1, CC jm:
loomulikus keeles väljendatud
= expressed in natural language

https://www.twinkl.com/teaching-wiki/informal-speech

https://en.wikipedia.org/wiki/Informal_learning

vt ka
- formaalne
- poolformaalne