1. The state of being external, especially as regards the perceiving mind or the idea at bottom.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• dexterality,
• wxternality,
• sxternality,
• dxternality,
• rxternality,
• 4xternality,
• 3xternality,
• ezternality,
• ecternality,
• edternality,
• extrnality,
• extrenality,
• externailty,
• externaltiy,
• externallity,
• extarnality,
• externallty,
• etereality,
• enveracity,
• Exterranity

• external,
• external organ,
• externalize,
• exterior,
• external ear,
• externalise,
• external angle,
• external gill,
• exothermal,
• external drive,
• exterritorial,
• externally.

The adjective form of the word "externality" is "external".

The plural of the "externality" can be the "externalities".

The singular of the "externality" can be the "externality".