n. 1 stain, spot, mark, smudge, blotch, blemish, disfigurement, smear, smirch, scar, Colloq splodge or US also splotch An ink blot covered the date of the document There are a few blots on his record from his time in the army.
v. 2 stain, spot, spatter, smudge, mark, blur You have blotted these pages where you wrote with a fountain-pen 3 blot one's copybook. err, destroy or ruin or mar or spoil one's reputation, commit an indiscretion, transgress, sin She's certainly blotted her copybook by having an affair with that subaltern 4 blot out. a obscure, conceal, cover (up), hide, eclipse, dim The clouds blotted out the sun for a few minutes b obliterate, destroy, erase, demolish, efface, annihilate, delete, rub or wipe out He subconsciously blotted out all memory of the accident