There are 2 definitions of sf in English:

sf1

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abbreviation

Music
Sforzando.

Definition of sf in:

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Word of the day anomalous
Pronunciation: əˈnɒm(ə)ləs
adjective
deviating from what is standard, normal, or expected

There are 2 definitions of sf in English:

SF2

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Pronunciation: /ɛsˈɛf
 
/

abbreviation

1Finland (international vehicle registration).
[from Finnish Suomi + Swedish Finland]
1.1Science fiction.
1.2Sinn Fein.

Definition of sf in: