Definitions for "Four-of-a-Kind"
Keywords:  rank, flush, poker, quads, beats
Very strong hand composed of four cards of the same rank, such as 6. Beats everything but the straight flushes. See hand rankings.
Exactly what i sounds like: For instance 2-2-2-2-7 is a four-of-a-kind hand. The only hand that beats four-of-a-king (or quads) is a straight flush.
holding four cards of equal rank