Also means
to make round, to round out
Usage Note
Arrondir is used both mathematically (arrondir un chiffre — to round a figure) and literally for shaping something into a curve. A popular idiomatic use is arrondir les fins de mois — to supplement one's monthly income, literally 'to round out the end of the month'. The noun arrondissement shares this root, originally meaning a rounding-off of an administrative territory.
Examples
"Il faut arrondir ce chiffre a l'entier superieur."
Natural Translation
This figure needs to be rounded up to the nearest whole number.

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