blank space; blank area
Specifically a blank space in a document, form, or written material.
この書類の空白に名前を書いてください。
Please write your name in the blank space on this document.
noun, noun which may take the genitive case particle 'no', na-adjective
Abstract or physical emptiness; can be used adjectivally with な or の.
彼の記憶には空白の期間がある。
There is a blank period in his memory.
画面が突然空白になった。
The screen suddenly went blank.
whitespace
Computing term for whitespace characters (spaces, tabs, etc.).
プログラムでは空白を無視する設定になっている。
The program is set to ignore whitespace.
Please fill in the blanks on the document.
There's a blank space on the resume.
Please leave this field blank.
My memory of the accident has become a complete blank.
idle time; down time; window period
blank period; gap; interregnum