1.a flaw or weak point;
he was quick to point out his wife's failings
2.powerlessness revealed by an inability to act;
in spite of their weakness the group remains highly active
3.the property of lacking physical or mental strength; liability to failure under pressure or stress or strain;
his weakness increased as he became older
4.the condition of being financially weak;
the weakness of the dollar against the yen
5.a penchant for something even though it might not be good for you;
he has a weakness for chocolate