greek

• Greek alphabet
• Greek language, or, more specifically:
  • Ancient Greek
  • Koine Greek
  • Medieval Greek
  • Modern Greek
• Greeks, a nation and a people

In other:

• Greek to me, an idiom/dead metaphor in English, claiming that an expression is incomprehensible
• Greeks (finance), a concept in mathematical finance
• Greek system, organizations found at many colleges and universities
• Greek (TV series), an ABC Family show

See also:

• Hellenic 

Ancient Greek colonies and communities were established throughout the Mediterranean, including southern Italy, Marseilles, and Barcelona, but Greek people have always concentrated around the Aegean coasts, where the Greek language has been spoken since antiquity. The Mycenaeans were the first historical people to arrive in the area now referred to as 'Greece'. According to Thucydides, the name of Hellas spread from a valley in Thessaly to all Greek-speaking peoples through Homer's works.