1. 延伸,擴充：延伸 extensions | 延伸,擴充 extensiveness | 延伸區,範圍 extent
2. 大范围：extensively 广大地 | extensiveness 大范围 | extensivepervading 溥
noun
1. large or extensive in breadth or importance or comprehensiveness
e.g. the might have repercussions of unimaginable largeness
the very extensiveness of his power was a temptation to abuse it
Synonym: largeness