quarantaine

/ka.ʁɑ̃.tɛn/
1.
nounfeminine

quarantine (period of isolation to prevent spread of disease)

Après son retour d'un pays à risque, il a dû observer une quarantaine chez lui.

After returning from a high‑risk country, he had to observe a quarantine at home.

Synonyms:isolement, mise en quarantaine
2.
nounfeminine

about forty (approximately forty of something, e.g., people)

Il y avait une quarantaine de personnes à la soirée.

There were about forty people at the party.

Synonyms:environ quarante, quelques dizaines
3.
nounfeminine

the period/age of being in one's forties

Elle est dans la quarantaine et cherche un emploi moins fatigant.

She's in her forties and is looking for a less tiring job.

Synonyms:être dans la quarantaine, avoir la quarantaine