noun
the cardinal number that is the sum of three and one (Freq. 13)
• Syn:
↑four, ↑IV, ↑tetrad, ↑quatern, ↑quaternion, ↑quaternary, ↑quaternity, ↑quartet, ↑quadruplet, ↑foursome, ↑Little Joe
adjective
being one more than three (Freq. 51)
• Similar to: ↑cardinal
Useful english dictionary. 2012.