What does stacco mean in music?

Answer 1

Possibly you mean. . .

Staccato - A direction to perform a note quickly, lightly, and separated from the notes before and after it. Staccato performance in practice reduces the time value of a note by one-half or more; thus a quarter note, performed staccato, lasts only as long as an eighth note, the rest of its value being replaced by silence… Staccato normally is indicated by a dot over or under the note to be so performed; sometimes the abbreviation stacc. appears. A series of dots combined with a slur indicates a kind of half-staccato called PORTATO. A short dash usually indicates a more pronounced staccato, slightly accented.