Webster's Revised Unabridged Dictionary · 1913

Sforzando

Sforzando , adjective

[Italian sforzando, p. pr., and sforzato, past participle of sforzare to force.]

(Music) Forcing or forced; -- a direction placed over a note, to signify that it must be executed with peculiar emphasis and force; -- marked fz (an abbreviation of forzando), sf, sfz, or {not transcribed}.

Also: Sforzato