weakness

noun

1. a flaw or weak point

   noun.state

   Synonyms failing

   Source: WordNet 3.0

2. powerlessness revealed by an inability to act

   noun.attribute

   Examples

   In spite of their weakness the group remains active.

   Synonyms helplessness impuissance

   Source: WordNet 3.0

3. the property of lacking physical or mental strength; liability to failure under pressure or stress or strain

   noun.attribute

   Examples

   His weakness increased as he became older.

   The weakness of the span was overlooked until it collapsed.

   Antonyms strength

   Source: WordNet 3.0

4. the condition of being financially weak

   noun.state

   Examples

   The weakness of the dollar against the yen.

   Source: WordNet 3.0

5. a penchant for something even though it might not be good for you

   noun.feeling

   Examples

   He has a weakness for chocolate.

   Source: WordNet 3.0

6. The quality or state of being weak; want of strength or firmness; lack of vigor; want of resolution or of moral strength; feebleness.

   noun

   Source: webster1913