the musical interval between one note and another four notes away from it
following the third position; number four in a countable series
coming next after the third and just before the fifth in position or time or degree or magnitude; "the quaternary period of geologic time extends from the end of the tertiary period to the present"
people in general (often used in the plural); "they're just country folk"; "folks around here drink moonshine"; "the common people determine the group character and preserve its customs from one generation to the next"