noun
An ink blot covered the date of the document. There are a few blots on his record from his time in the army
verb
You have blotted these pages where you wrote with a fountain-pen
She's certainly blotted her copybook by having an affair with that subaltern
blot out
The clouds blotted out the sun for a few minutes
He subconsciously blotted out all memory of the accident
US