outcode noun 2verb 1forms 3 noun2 •The first part of a United Kingdom postcode, before the space.The outcodes are used to get mail to the correct postal office for delivery by mail carriers. — 2007 •A code used in the Cohen-Sutherland algorithm, indicating how a line should be clipped relative to the viewport. verb1 •To surpass in computer programming ability.It's a great test of the claims of open-source gurus, who say that a self-motivated community can outcode any team working for a single employer—like, um, Microsoft. — 2002 formsoutcoded · outcoding · outcodes