S.I.

• SI
• S. I. (International System of Units)

From French S.I..

S.I.

1. Synonym of SI (International System of Units)

S.I.

1. (UK, Canada, Australia, law, in citation) Initialism of statutory instrument.

   Coordinate terms: S.S.I., L.N.

   Civil Procedure Rules 1998, S.I. 1998/3132 (L. 17)

• 'is, I's, IS, Is, i's, is, is-, is.

• S. I.

Abbreviation of Système international (Système international d'unités).

S.I. m

1. S.I.; synonym of SI (International System of Units)

• SI, S. I., S. J.

S.I. f (indeclinable)

1. (Roman Catholicism) abbreviation of Societās Iēsū (“Society of Jesus”); the Jesuits