"blankest" in the adjective sense
1. blank, clean, white
of a surface) not written or printed on
"blank pages"
"fill in the blank spaces"
"a clean page"
"wide white margins"
2. blank
without comprehension
"When I called her name, she gave me a blank look, as though she didn't know me"
3. blank
not charged with a bullet
"a blank cartridge"
4. blank, utter
complete and absolute
"utter seriousness"
"blank stupidity"
Source: WordNet® (An amazing lexical database of English)
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