'Only' or 'just', used to limit or specify a subject or range.
When to use
Limiting, Emphasizing, In negative sentences
The nuance
만 attaches to nouns to limit or emphasize that noun exclusively. For example, 나만 (only me), 이거만 (only this). It is often used in negative or comparative contexts to stress exclusivity, unlike '~뿐만 아니라' which means 'not only'.
