Definition of "adjacency"

at that point the Needle conforms unto the true Meridian, and is not distracted by the vicinity of Adjacencies.

1672, Thomas Browne, Pseudodoxia Epidemica‎

“With the adjacencies for victims whose families wish them to be listed together, […] , this is an approach that I hope will be acceptable to the great majority of the families affected,” he said afterward.

2007 January 11, David W. Dunlap, “Still, the Question of Displaying the Names of 9/11”, in New York Times‎