What is the meaning of Pyrrhic?

Of or characterized by pyrrhics (metrical feet with two short syllables).

Relating to Pyrrhus, a Macedonian king, or some of his costly victories he had while fighting Rome.

Alternative letter-case form of Pyrrhic (achieved at too great a cost)

An Ancient Greek war dance.

A metric foot with two short or unaccented syllables.

Source: wiktionary.org