Full Idea
'Conceptual role semantics' says the logical constants mean what they do by virtue of figuring in certain inferences and/or sentences involving them and not others, ..so some inferences and sentences are constitutive of an expression's meaning.
Gist of Idea
'Conceptual role semantics' says terms have meaning from sentences and/or inferences
Source
Paul Boghossian (Analyticity Reconsidered [1996], §III)
Book Reference
-: 'Nous' [-], p.16
A Reaction
If the meaning of the terms derives from the sentences in which they figure, that seems to be meaning-as-use. The view that it depends on the inferences seems very different, and is a more interesting but more risky claim.