Full Idea
Words only exist is 'spacings' (of time and space), so there are no synchronic meanings (except perhaps in writing).
Clarification
'Synchronic' means occurring together
Gist of Idea
Words exist in 'spacing', so meanings are never synchronic except in writing
Source
Jacques Derrida (works [1990]), quoted by Barry Stocker - Derrida on Deconstruction
Book Reference
Stocker,Barry: 'Derrida on Deconstruction' [Routledge 2006], p.55