Noun

(polarities)

The separation, alignment or orientation of something into two opposed poles.

Either of the two extremes of such attributes.

(chemistry) The dipole-dipole intermolecular forces between the slightly positively-charged end of one molecule to the negative end of another or the same molecule.

Noun

(possibilities)

The quality of being possible.

A thing possible; that which may take place or come into being.

* {{quote-magazine, date=2013-07-20, volume=408, issue=8845, magazine=(The Economist)

, title= The attack of the MOOCs , passage=Since the launch early last year of […] two Silicon Valley start-ups offering free education through MOOCs, massive open online courses, the ivory towers of academia have been shaken to their foundations. University brands built in some cases over centuries have been forced to contemplate the possibility that information technology will rapidly make their existing business model obsolete.}}

An option or choice, usually used in context with future events.