C-note as a noun (US, informal):
A one-hundred dollar banknote.
C-note as a noun (music):
the lowest note of an instrument, written below the staff and the D note.
Hundred as a noun:
A hundred-dollar bill, or any other note denominated 100 (e.g. a hundred euros).
Hundred as a noun (historical):
An administrative subdivision of southern English counties formerly reckoned as comprising 100 hides (households or families) and notionally equal to 12,000 acres.
Hundred as a noun (by extension, historical):
Similar divisions in other areas, particularly in other areas of Britain or the British Empire
Hundred as a noun (cricket):
A score of one hundred runs or more scored by a batsman.
"He made a hundred in the historic match."