'Senselessness' definitions:

Definition of 'senselessness'

noun

Total lack of meaning or ideas [syn: inanity, senselessness, mindlessness, vacuity, pointlessness]

From: GCIDE

Senseless \Sense"less\, a. Destitute of, deficient in, or contrary to, sense; without sensibility or feeling; unconscious; stupid; foolish; unwise; unreasonable. [1913 Webster]
You blocks, you stones, you worse than senseless things. --Shak. [1913 Webster]
The ears are senseless that should give us hearing. --Shak. [1913 Webster]
The senseless grave feels not your pious sorrows. --Rowe. [1913 Webster]
They were a senseless, stupid race. --Swift. [1913 Webster]
They would repent this their senseless perverseness when it would be too late. --Clarendon. [1913 Webster] -- {Sense"less*ly}, adv. -- {Sense"less*ness}, n. [1913 Webster]