Definitions for "Strangeness"
In particle physics, strangeness, denoted as S, is a property of particles, expressed as a quantum number for describing decay of particles in strong and electro-magnetic reactions, which occur in a short period of time.
The state or quality of being strange (in any sense of the adjective).
the quality of being alien or not native; "the strangeness of a foreigner"
unusualness as a consequence of not being well known