Negligence or fault, as distinguishable from dolus (deceit, fraud), which implies intent, culpa being imputable to defect of intellect, dolus to defect of heart(noun)
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Use "culpa" in a sentence
"For this, I can only beat my breast violently and mutter _mea culpa, mea culpa, mea maxima culpa_."
"'_Mea culpa, mea culpa_,' he murmured wearily, then as he rose up with pale cheek a gleam of fire lit in his eye, for he would die rather than permit Saint Oswyn's shrine to be pillaged by the heathen."
"I heard him murmur to himself: '_Illa culpa, illa culpa, illa maxima culpa_.'"