Weakness

1. n. That which is a mark of lack of strength or resolution; a fault; a defect.
2. n. The quality or state of being weak; want of strength or firmness; lack of vigor; want of resolution or of moral strength; feebleness.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.