Alexander the Great Glossary: Important Terms and Definitions

This glossary provides concise, clear definitions of essential historical, military, geographic, and cultural terms associated with Alexander the Great. Ideal for historians, students, educators, and enthusiasts, this guide offers an accessible reference for exploring Alexander's extraordinary life, conquests, and legacy.

A

  • Alexander III of Macedon

    Known as Alexander the Great; King of Macedonia (356–323 BC), renowned for his extensive empire stretching from Greece to India.

  • Alexandria

    City in Egypt founded by Alexander in 331 BC; became a major cultural and intellectual center.

  • Aristotle

    Famous Greek philosopher and scientist; Alexander’s tutor during his youth.

B

  • Battle of Issus (333 BC)

    Significant victory by Alexander over Persian King Darius III, opening the path into Egypt.

  • Battle of Gaugamela (331 BC)

    Decisive battle where Alexander defeated Darius III, securing Persian territories.

C

  • Companions (Hetairoi)

    Elite cavalry and close companions who formed Alexander's personal guard and core battlefield force.

D

  • Darius III

    The last king of the Achaemenid Persian Empire, defeated multiple times by Alexander.

  • Diadochi

    Successors of Alexander, generals and friends who divided his empire after his death.

G

  • Gordian Knot

    Legendary knot associated with prophecy; famously "solved" by Alexander in Gordium, symbolizing his destined conquest of Asia.

  • Granicus River (Battle of, 334 BC)

    Alexander’s first major victory against Persian forces in Asia Minor.

H

  • Hellenism

    Spread of Greek culture, ideas, and influence across Alexander’s empire and beyond.

  • Hephaestion

    Closest companion, trusted general, and lifelong friend of Alexander.

M

  • Macedonian Phalanx

    Military formation of infantry armed with long spears (sarissa); cornerstone of Alexander’s tactical success.

O

  • Oracle of Ammon

    Oracle at Siwa Oasis, Egypt, which declared Alexander a divine son of Zeus-Ammon, enhancing his status and authority.

P

  • Persepolis

    Ancient capital of Persia, captured and partially destroyed by Alexander’s forces in 330 BC.

  • Ptolemy I Soter

    General under Alexander; later founded Egypt’s Ptolemaic dynasty after Alexander's death.

R

  • Roxanne (Roxana)

    Wife of Alexander, a noblewoman from Bactria; mother of Alexander IV.

S

  • Siege of Tyre (332 BC)

    Major siege in Phoenicia where Alexander overcame heavy fortifications to secure strategic coastal territory.

W

  • Wars of the Diadochi

    Conflicts fought among Alexander’s successors over the division of his empire following his death.

Z

  • Zeus-Ammon

    Hybrid Greek-Egyptian deity identified with Zeus, worshipped prominently after Alexander’s visit to Siwa Oasis.