Full Idea
A name cannot be dissected any further by means of a definition: it is a primitive sign.
Gist of Idea
Names are primitive, and cannot be analysed
Source
Ludwig Wittgenstein (Tractatus Logico-Philosophicus [1921], 3.26)
Book Reference
Wittgenstein,Ludwig: 'Tractatus Logico-Philosophicus (Pears)', ed/tr. Pears,D. /McGuinness,B. [RKP 1961], p.13
A Reaction
All logicians and analytic philosophers seem to agree on this. He means terms which pick out specific objects.