'Soberness' definitions:

Definition of 'soberness'

From: WordNet
noun
The state of being sober and not intoxicated by alcohol [syn: soberness, sobriety] [ant: drunkenness, inebriation, inebriety, insobriety, intoxication, tipsiness]
noun
A manner that is serious and solemn [syn: graveness, gravity, sobriety, soberness, somberness, sombreness]

Definition of 'Soberness'

From: GCIDE
  • Soberness \So"ber*ness\, n. The quality or state of being sober. [1913 Webster]