adjacent English · revision 7690

+ {{infobox|confidence=established|formation=borrowing|attested=before 1420|origins=la adiaceo}}

+

+ ==Pronunciation==

+ * IPA: /əˈd͡ʒeɪ.sənt/^(Wiktionary)

+

+ ==Etymology==

+ It is Middle English, [[bor|la|adiacens|alt=adjacēns|t=lying near]], the present participle of [[m|la|adiaceo|alt=adjacēre|t=to lie near, border on]],^(Barnhart 1988)^(Etymonline)^(Hoad 1986) partly through Anglo-French agisaunt,^(MWU 2024) from ad-, near, and jacēre, to lie, rest, related to jacere, to throw (see [[jet]]),^(Barnhart 1988)^(Etymonline) from PIE [[ine-pro|*yeh₁-|alt=*ye-|t=to throw, impel]].^(Etymonline)

+

+ ==Earliest recorded meaning==

+ Lying near, bordering: before 1420, in Lydgate's ''Troy Book'';^(Barnhart 1988) about 1430 in the OED.^(OED 1989)

+

+ ==Semantic evolution==

+ The OED notes that it does not necessarily mean touching.^(OED 1989) Etymonline adds that adjacent properly means near but not necessarily in contact, while adjoining means touching, and that it is used only of things, never of persons or animals.^(Etymonline) As a noun, an adjoining part, it is from 1610.^(OED 1989) In mathematics, of vertices or edges of a graph, joined directly, is a later technical sense.^(Collins 2023)

+

+ ==Timeline==

+ * before 1420 – lying near.^(Barnhart 1988)

+ * 1610 – the noun.^(OED 1989)

+

+ ==Modern meaning==

+ ===Adjective===

+ # Close to or lying near; [[neighbouring]].^(AHD)^(Collins 2023)

+ # Next to; [[adjoining]].^(AHD)^(Collins 2023)

+ # ''(mathematics)'' Of two vertices of a graph, joined by an edge, or of two edges, meeting at a vertex.^(Collins 2023)

+

+ ==Word family==

+ * [[adjacently]]

+ * [[subadjacent]]

+ * [[unadjacent]]

+ * [[adjacency]]

+ * [[nonadjacent]]

+ * [[adjacent angle]]

+

+ ==Related words==

+ * [[adjoin]]

+ * [[jet]]

+ * [[eject]]

+ * [[subject]]

+ * [[object]]

+

+ ==References==

+ {{reflist}}