Blot–out

a spot or stain, especially of ink on paper.
a blemish on a person’s character or reputation:
He had been haunted by a blot on his past.
Archaic. an erasure or obliteration, as in a writing.
to spot, stain, soil, or the like.
to darken; make dim; obscure or eclipse (usually followed by out):
We watched as the moon blotted out the sun.
to dry with absorbent paper or the like:
to blot the wet pane.
to remove with absorbent paper or the like.
to make a blot; spread ink, dye, etc., in a stain:
The more slowly I write, the more this pen blots.
to become blotted or stained:
This paper blots too easily.
Chemistry. to transfer an array of separated components of a mixture to a chemically treated paper for analysis.
Compare gel, gel electrophoresis.
blot out,

to make indistinguishable; obliterate:
to blot out a name from the record.
to wipe out completely; destroy:
Whole cities were blotted out by bombs.

Contemporary Examples

How Do We Deal with the Baseless Hatred at the Western Wall? Emily L. Hauser July 11, 2013
How To Take Purim Seriously Shaul Magid February 20, 2013

Historical Examples

Katrine Elinor Macartney Lane
The Northern Iron George A. Birmingham
History of Dogma, Volume 2 (of 7) Adolph Harnack
Little Folks (November 1884) Various
Blue Lights R.M. Ballantyne
Oh, You Tex! William Macleod Raine
Out To Win Coningsby Dawson
The Great Events by Famous Historians, Volume 03 Various

noun
a stain or spot of ink, paint, dirt, etc
something that spoils or detracts from the beauty or worth of something
a blemish or stain on one’s character or reputation
verb blots, blotting, blotted
(of ink, dye, etc) to form spots or blobs on (a material) or (of a person) to cause such spots or blobs to form on (a material)
(informal) blot one’s copybook, to spoil one’s reputation by making a mistake, offending against social customs, etc
(intransitive) to stain or become stained or spotted
(transitive) to cause a blemish in or on; disgrace
to soak up (excess ink, etc) by using blotting paper or some other absorbent material
(of blotting paper or some other absorbent material) to absorb (excess ink, etc)
(transitive) often foll by out

to darken or hide completely; obscure; obliterate
to destroy; annihilate

noun
(backgammon) a man exposed by being placed alone on a point and therefore able to be taken by the other player
(archaic) a weak spot
n.
v.

Obliterate, wipe out of existence or memory, as in At least one Indian nation was blotted out as the pioneers moved west, or The trauma of the accident blotted out all her memory of recent events. This idiom, first recorded in 1516, uses the verb to blot in the sense of making something illegible by spotting or staining it with ink. The New Testament has it (Acts 3:19): “Repent ye … that your sins may be blotted out.”