1580s, "opposed to moral order," also "opposed to legal authority;" see dis- + orderly (adj.). The meaning "untidy" is attested from 1630s; the older senses are those in disorderly house, disorderly conduct, etc.
1. In most of the residence halls we visited, rules prohibit disorderly conduct.
2. Mr Ling was acquitted of disorderly behaviour by magistrates.
3. He pleaded guilty to being disorderly on licensed premises.
4. Football matches are disorderly events.
5. They were arrested for being drunk and disorderly .