ブラウザの設定でJava Scriptの使用を有効にしてご利用ください。
出典:Wiktionary
出典:『Wiktionary』 (2010/09/17 04:00 UTC 版)
Probably from the need to draw lines outside the perimeter of the nine dots in the "nine dots" puzzle.
outside the box (comparative more outside the box, superlative most outside the box)
outsideofthebox