Weakness definition

(1) 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"

(2) Powerlessness revealed by an inability to act

"In spite of their weakness the group remains highly active"

(3) A penchant for something even though it might not be good for you

"He has a weakness for chocolate"

(4) A flaw or weak point

"He was quick to point out his wife's failings"

(5) The condition of being financially weak

"The weakness of the dollar against the yen"