My paper aims to analyse the Platonic conception of ontological ὰλήθεια and verify whether or not this conception depends on the etymological origin of the Greek word as a derivative noun from λανθάνειν. I shall start my inquiry by referring to Heidegger’s philosophical characterisation of ὰλήθεια as Unverborgenheit, and move on to quote relevant passages from the Homeric poems. I shall try to demonstrate – through the evidence from some key-passages of the Republic, the Phaedo, the Phaedrus and the Philebus (...) – that, even if we can find an ontological conception of the truth in Plato, this does not depend on the Greek etymology of ὰλήθεια, but rather on the archaic correspondance between being and thought. (shrink)