This is the 66th most frequent French word.
nos
"Nos" means "our" (plural).
Determiner indicating possession for 'amis', clarifying it belongs to us.
Nos amis viendront demain.
Our friends will come tomorrow.
Possessive adjective modifying 'vacances' to indicate they belong to us.
Pendant nos vacances, nous avons visité Paris.
During our vacation, we visited Paris.
Possessive adjectival usage showing the relationship of 'devoirs' to the subjects 'nous'.