Wittgenstein, LudwigWitt‧gen‧stein, Lud‧wig /ˈvɪtɡənʃtaɪn, ˈlʊdvɪɡ $ -wɪɡ/(1889–1951) an Austrian philosopher, who studied and taught at Cambridge in the UK. His interests included the relationship between language and the physical world, and his best known works are Tractatus Logico-Philosophicus and Philosophical Investigations.