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Meaning of SIO | Babel Free

Noun CEFR A2

Definitions

  1. Initialism of senior investigating officer.
    UK, abbreviation, alt-of, initialism
  2. Initialism of snap-in-one.
    abbreviation, alt-of, initialism, slang

CEFR level

A2
Elementary
This word is part of the CEFR A2 vocabulary — elementary level.

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