Adjacent or adjacency may refer to: Adjacent (graph theory), two vertices that are the endpoints of an edge in a graph Adjacent (music), a conjunct step to a note which is next in the scale See also Adjacent angles, two angles that share a common ray Adjacent channel in broadcasting, a channel that is next to another channel Adjacency matrix, a matrix that represents a graph Adjacency pairs in pragmatics, paired utterances such as a question and answer Adjacent side (polygon), a side that shares an angle with another given side Adjacent side (right triangle), the side (or cathetus) of a right triangle that touches a given non-right angle