Adjacent means right next to something, touching along an edge. The adjacent seat, the adjacent building, the field adjacent to the car park.
It nearly always takes TO — adjacent to the school, adjacent to the border — or it stands after the noun on its own: the room adjacent. In mathematics it has a precise job, since adjacent angles share a side and adjacent sides of a shape meet at a corner. It is more formal than next to, which is why it turns up in planning documents, property listings and technical writing rather than in speech. Careful with nearby: adjacent things touch, nearby things are only close. English has also turned it into a suffix — tech-adjacent, art-adjacent — for something near a world without belonging to it.
1adjectiveadjacentNext to something and touching it, or sharing a border with it.
“They bought the plot adjacent to the church and built a garage on it.”
synonyms: neighbouring, abutting, bordering
2adjectivemathematicsIn mathematics, sharing a common side or point.
“The two adjacent angles add up to a straight line.”
3adjectivecloseClose to a group or field without being part of it, used after a noun.
“His job is publishing-adjacent: he sells the paper the books are printed on.”
Also accepted in games: neighboring
Latin adiaceō meant to lie beside, from ad, to, and iaceō, to lie down. Adjacent is its present participle, adiacēns: the thing that is lying alongside. A field adjacent to yours is, at the root of the word, a field lying down next to it.
Proto-Indo-European
*(H)yeh₁-
Latin
adiacēns
English, today
adjacent
Built from
From Latin adiacēns. Borrowed from Latin adiacēns, adiacentis, derivative of adiaceō (“to lie beside”); from ad (“to”) + iaceō (“to lie down”).
Etymology from Wiktionary, CC BY-SA
Practised in Sharper Adjectives, Directions & Position