Meaning

adjective nearest in space or position; immediately adjoining without intervening space

adjective having a common boundary or edge; abutting; touching

adjective near or close to but not necessarily touching

originEtymology tree Proto-Indo-European *h₂éd Proto-Italic *ad Proto-Italic *ad- Latin ad- Proto-Indo-European *(H)yeh₁- Proto-Italic *jakēō Latin iaceō Latin adiaceō Latin adiacēnsder. English adjacent Borrowed from Latin adiacēns, adiacentis, derivative of adiaceō (“to lie beside”); from ad (“to”) + iaceō (“to lie down”).

Etymology from Wiktionary, CC BY-SA 3.0