one-per-filerule
nounUK /wʌn pɜː faɪl ruːl/
US /wʌn pɜr faɪl rul/
A rule that says only one person can be in each line.
The teacher used the one-per-filerule so everyone waited their turn.
OTHER MEANINGS
2. A computer rule that lets only one program use a file at a time.
The system's one-per-filerule stopped two apps from editing the same document.
3. A policy that allows only one person to access a shared record.
The office applied a one-per-filerule to keep patient records private.
4. A guideline that limits each person to one submission per file.
The contest's one-per-filerule meant each student could enter only once.