adjective. ['ˈkwɑːtɝˌnɛri'] consisting of or especially arranged in sets of four.
noun. ['ˈkwɑːtɝˌnɛri'] the cardinal number that is the sum of three and one.
adjective. ['ˈkwɑːtɝˌnɛri'] coming next after the third and just before the fifth in position or time or degree or magnitude.