The act of adding; application; accretion.
- Grammar A construction in which a noun or noun phrase is placed with another as an explanatory equivalent, both having the same syntactic relation to the other elements in the sentence; for example, Copley and the painter in The painter Copley was born in Boston.
- Grammar The relationship between such nouns or noun phrases.
- A placing side by side or next to each other.
- Biology The growth of successive layers of a cell wall.