definition of
weakness

[1] #1 weakness n. [failing] a flaw or weak point; "he was quick to point out his wife's failings". wn

[2] #2 weakness n. [helplessness, impuissance] powerlessness revealed by an inability to act; "in spite of their weakness the group remains active". wn

[3] #3 weakness n. the property of lacking physical or mental strength; liability to failure under pressure or stress or strain; "his weakness increased as he became older"; "the weakness of the span was overlooked until it collapsed". wn

[4] #4 weakness n. the condition of being financially weak; "the weakness of the dollar against the yen". wn

[5] #5 weakness n. a penchant for something even though it might not be good for you; "he has a weakness for chocolate". wn