Definitions
Done secretly, often to gather information or conceal identity.
Word origin
From under + cover.
Used in a sentence
“To oversimplify, if black males age 20 to 29 are undercovered by 50 percent, then the first stage sampling weights for black males age 20 to 29 are doubled to properly sum to known population totals.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer2 curated clues
01“Done in secret”10 letters
02“Secretly disguised”10 letters
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