a person convicted of any criminal offence for the first time
WordReference Random House Unabridged Dictionary of American English © 2025
first′ offend′er,
- Lawa person convicted of an offense of law for the first time.
- 1840–50
Collins Concise English Dictionary © HarperCollins Publishers::
'first offender' also found in these entries (note: many are not synonyms or translations):