Also means
quarantine
Usage Note
Quarantaine primarily means 'about forty' or 'one's forties' — il a la quarantaine ('he is in his forties'). Its second meaning, quarantine, recalls the 40-day isolation once imposed on ships at port. The medical sense is mise en quarantaine.
Examples
"Elle approche de la quarantaine."
Natural Translation
She is approaching her forties.

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