What is a treble staff?

I'll get to the thing in a moment. First, something about the Word.

Speaking of musical notation, the singular Word is usually "staff"; the plural can be "staffs" or "staves." "Stave," however, is the Word for a wooden strip that is one piece of a barrel.

A staff, or possibly stave, in music is a series of (usually five) parallel lines on which you write notes. The treble (as opposed to bass) staff has a treble clef and is for (1) high-pitched instruments or (2) voices of most women singers.