(GUI, US, Canada) To remove a checkmark.
Uncheck the “save my password” box.
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(travel, aviation) To remove a previously checked-in passenger from the check-in system, allowing changes to the ticket.
If you uncheck either of these check boxes, [[w:Microsoft Expression Web
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Add your own interpretation of "uncheck".
Regional slang from around the English-speaking world — British, Australian, Irish, Caribbean, Nigerian, Filipino, AAVE, and the hyphenated-English dialects that make the internet sound local.
See all Regional & Other slang on Slangora.