Apposition

the act of placing together or bringing into proximity; juxtaposition.
the addition or application of one thing to another thing.
grammar. a syntactic relation between expressions, usually consecutive, that have the same function and the same relation to other elements in the sentence, the second expression identifying or supplementing the first. in washington, our first president, the phrase our first president is in apposition with washington.
biology. growth of a cell wall by the deposition of new particles in layers on the wall.
compare (def 2).
historical examples

in which case the construction would be a matter, not of apposition, but of agreement.
the english language robert gordon latham

i believe that i did not understand what he meant by apposition.
more letters of charles darwin charles darwin

placing the two nouns in apposition is much the same as using the first as an adjective.
compound words frederick w. hamilton

now the words roman emperor are said to be in apposition to csar.
a handbook of the english language robert gordon latham

a noun in apposition may come between antecedent and relative, because in such a combination no real ambiguity can arise.
the elements of style william strunk

a noun clause may also be used in apposition to a noun to explain its meaning.
plain english marian wharton

you remember that in clauses we found that a clause may be placed in apposition with a noun to explain the meaning of that noun.
plain english marian wharton

with the apposition of cupolas the growing central capsule may form dome-shaped protuberances which enter into the former.
report on the radiolaria collected by h.m.s. challenger during the years 1873-1876, first part: porulosa (spumellaria and acantharia) ernst haeckel

these two areas are brought into apposition by means of a strong suture p-ssed through their centre.
a system of operative surgery, volume iv (of 4) various

in this he is mistaken; it is so used frequently, as here, in apposition.
the bbur-nma in english babur, emperor of hindustan

noun
a putting into juxtaposition
a grammatical construction in which a word, esp a noun phrase, is placed after another to modify its meaning
(biology) growth in the thickness of a cell wall by the deposition of successive layers of material compare intussusception (sense 2)
n.

“application” (of one thing to another), mid-15c., originally in grammatical sense, from latin appositionem (nominative appositio), noun of action from past participle stem of apponere “to put to” (see apposite). general sense is from 1540s.

apposition ap·po·si·tion (āp’ə-zĭsh’ən)
n.

the putting in contact of two parts or substances.

the condition of being placed or fitted together.

the growth of successive layers of a cell wall.

ap’po·si’tion·al adj.
ap’po·si’tion·al·ly adv.