magnanimous

magnanimous \mag-NAN-uh-muhs\, adjective:

1. noble in mind or soul; free from mean or petty feelings or acts
2. showing a generous spirit; generous in forgiving

But an even greater responsibility falls on Obama as the nominee. Losers have to be gracious, but winners have to be magnanimous.
-- Michael Tomasky, The Guardian, 2008-06-02

From the architect's point of view, the ideal project is not one with a magnanimous absent client. It is one with a magnanimous thoughtful client.
-- Witold Rybczynski, The Atlantic, 2002-09-01

Ever the confident, magnanimous Leo, this August-born collector found it impossible to resist the black marble mantel flanked by muscular plaster lions.
-- Elana Ashanti Jefferson, Denver Post, 2007-12-07

by 1547 from Latin magnanimus "having a great soul," from magnus "great" + animus "soul, spirit." Probably a loan-translation of Greek megalopsychos "high-souled, generous" (Aristotle) or megathymus "great-hearted."