Easton's Bible Dictionary
A stain or reproach (Job 31:7; Proverbs 9:7). To blot out sin is to forgive it (Psalm 51:1, 9; Isaiah 44:22; Acts 3:19). Christ's blotting out the handwriting of ordinances was his fulfilling the law in our behalf (Colossians 2:14).
Noah Webster's New International Dictionary of the English Language
1. (v. t.) To spot, stain, or bespatter, as with ink.
2. (v. t.) To impair; to damage; to mar; to soil.
3. (v. t.) To stain with infamy; to disgrace.
4. (v. t.) To obliterate, as writing with ink; to cancel; to efface; -- generally with out; as, to blot out a word or a sentence. Often figuratively; as, to blot out offenses.
5. (v. t.) To obscure; to eclipse; to shadow.
6. (v. t.) To dry, as writing, with blotting paper.
7. (v. i.) To take a blot; as, this paper blots easily.
8. (n.) A spot or stain, as of ink on paper; a blur.
9. (n.) An obliteration of something written or printed; an erasure.
10. (n.) A spot on reputation; a stain; a disgrace; a reproach; a blemish.
11. (n.) An exposure of a single man to be taken up.
12. (n.) A single man left on a point, exposed to be taken up.
13. (n.) A weak point; a failing; an exposed point or mark.