fill in the blank


Also found in: Acronyms.

fill in the blank

1. To provide information or details, usually by actually writing something in a blank space on a test, form, etc. Fill in the blank with what you think is the correct answer.
2. To figure something out; to determine an answer to something that was previously unknown. My parents may not know who dented the car now, but they'll fill in the blank eventually.
See also: blank, fill