ADJA'CENCY, noun [Latin adjaceo, to lie contiguous, from ad and jaceo, to lie.] The state of lying close or contiguous; a bordering upon, or lying next to; as the adjacency of lands or buildings. In the sense of that which is adjacent, as used by Brown, it is not legitimate.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI