There are 2 definitions of sf in English:

sf1

Syllabification: sf

abbreviation

Music
Sforzando.

Definition of sf in:

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Word of the day apposite
Pronunciation: ˈapəzɪt
adjective
apt in the circumstances or relation to something

There are 2 definitions of sf in English:

SF2

Syllabification: SF

abbreviation

1Science fiction.
1.1Sinn Fein.
1.2 Military Special Forces.

Definition of sf in: