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C'est juste à côté.
It is right next door.
Adverb of precision or recency: just, exactly, only just.
C'est juste à côté.
It is right next door.
Il vient juste de partir.
He has just left.
Venir juste de + infinitive = to have just done something.
Adjective meaning fair, right, or exact.
C'est une décision juste.
That is a fair decision.
Agrees: juste is invariable in spelling except plural justes.
From Latin justus (just, fair).