foible /ˈfɔɪbəl/noun 3adjective 1forms 3 noun3 •[in the plural] A quirk, idiosyncrasy, frailty, or mannerism; an unusual habit that is slightly strange or silly.Try to look past his foibles and see the friendly fellow underneath. •A weakness or failing of character.Jesus is reverenced as the one man who has lived unspotted by the world, free from human foibles, able to redeem mankind by his example. — 1932 •Part of a sword between the middle and the point, weaker than the forte. adjective1 •(no longer used) Weak; feeble. formsfoibles · more foible · most foible