Noun staleness has 2 senses

• staleness(n = noun.cognition) triteness - unoriginality as a result of being dull and hackneyed; Array
is a kind of unoriginality
has particulars: camp
Derived form adjective stale₂

• staleness(n = noun.attribute) Array - having lost purity and freshness as a consequence of aging; Array
is a kind of oldness
has particulars: moldiness, must, mustiness
Antonym: freshness
Derived form adjective stale₁