Capable of being placed side by side or brought next to something else; able to be placed adjacent.
From appose (Latin apponere: ad- 'to' + ponere 'to place') plus -able suffix. A formal grammatical and linguistic term.
In grammar, apposable nouns can be placed next to each other—like in 'President Lincoln' where the titles/names are apposable; this structure is so common we barely notice it, but it's a fundamental way English works.
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