Open English Wordnet
Nouns
(n)appositiona grammatical relation between a word and a noun phrase that follows“`Rudolph the red-nosed reindeer' is an example of apposition”
(n)apposition(biology) growth in the thickness of a cell wall by the deposit of successive layers of material
(n)juxtaposition, apposition, collocationthe act of positioning close together (or side by side)“it is the result of the juxtaposition of contrasting colors”