A musical composition in four parts, each performed by a single voice or instrument.
A group of four musicians who perform classical music together.
A group of four singers, usually males, who sings together in four-part harmony.
A group of four people or things, particularly
A group of six notes played in the time of four, with an accent only on the first note.
A group of six notes played in the time of four, with accents on the first and fourth notes; a double triplet.
A group of six objects.
One of a group of six persons or animals born from the same mother during the same birth.
A group of six notes played in the time of four, with accents on the first, third and fifth notes.