conjacencyrare.|kənˈdʒeɪsənsɪ| [f. L. conjacēnt-em, pr.pple. of conjacēre to lie together: see -ency.] The quality of lying close together. 1820Blackw. Mag. VI. 652 Proportional..to the compactness of the brain, or to its conjacency, if we may be allowed to contrive a useful word.