Related content:
Bars
Clef
Incomplete bars
Ledger Lines
Measures
Repeat dots
Time lines (brackets)
Time signatures
Accidentals
Blank staff paper
Cambridge Dictionaries Online "staff" (US) vs "stave" (UK)
A staff is a set of 5 horizontal lines on/between which the musical symbols are written.
TED-Ed: How to read music - Tim Hansen